Pcm power relay - Possible causes of the P0688 code include a defective PCM power relay, a faulty PCM, and a blown fuse or fusible link. Some symptoms of the P0688 code include an …

 
P068A – ECM/PCM Power Relay De-Energized Performance - Too EarlyThis trouble code is usually not something to worry about, just clear it. We've seen it pop u.... 15x6.00 6 nhs tire

The P0688 trouble code is often caused by an open circuit in the power relay sense circuit. This can occur due to a faulty ECM/PCM relay, which is responsible for supplying battery voltage and ground signals to the ECM. Corroded, loose, or damaged wiring and connectors can also lead to the storage of the P0688 trouble code.The powertrain control module(PCM) controls your ride’s powertrain. It manages your engine, transmission, and other related components based on the data sent by various sensors. In a nutshell, the PCM is the brain of your vehicle. Resetting the PCM will not typically clear all learned parameters and adaptive data in all vehicles.What is a PCM relay and how does it work? A PCM relay is an electromechanical device that controls the power supply to the Powertrain Control Module in vehicles. It functions as a switch, activated by the ignition to supply or cut off power to the PCM. How can I tell if my PCM relay is failing?One of the most common symptoms of a faulty ECM/PCM power relay is engine stalling . If your engine stalls while driving or idling, it could be a sign that the …’06-’08: PCM relay coil: 13: 10: ... PCM power, Intake Manifold Runner Control (4.2L engine) 35: 20: Instrument cluster high beam indicator, High beam headlamps, DRL disable relay (’08) 36: 10: Trailer tow right turn/stop lamps: 37: 20: Rear power point, Center console power point (’07) 38: 25:P0687 is a diagnostic trouble code (DTC) for "ECM/PCM Power Relay Control Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .When code P068A is stored, it indicates that the engine/powertrain control module (ECM/PCM) has detected a flaw in the de-energizing procedure for the relay that supplies it with voltage. In this case, the relay has de-energized prematurely. The PCM power relay is utilized to safely apply battery voltage to the appropriate PCM circuits. The fifth wire is the power relay sense circuit. It is used by the PCM to monitor power relay voltage. If the PCM detects an open power relay sense circuit, a code P0688 will be stored and a malfunction indicator lamp (MIL) may be illuminated. A typical PCM powertrain control module, opened up: Depending on the application, the TCR may be located in the intelligent power module (IPM), which is basically a smart fuse box, or in a standard fuse box. An example of a transmission control relay. (Courtesy: ALLDATA) Code P0888 indicates the TCM has detected a problem with the transmission control relay and/or circuit.Technical description and explained code P068A. If your OBD-II equipped vehicle has stored code P068A. This means that the engine/transmission control module (ECM / PCM) has detected a fault. Which is related to the procedure of de-energizing the relay supplying voltage to the ECM / PCM.If you've got aging parents, at some point you may have to manage their financial affairs. They'll give you a power of attorney. A handy guide from the government shows you what ...Fuel pump testing at the CCRM: Pin 5 is output power to the pump. Pin 11 is battery power to the FP relay. Pin 13 is ignition input to energize the relay. Pin 18 should show ground when the pump is on. Testing here needs to be careful since the ground pulse to the relay goes away after the Prime-out. Good luck.P0689 is a diagnostic trouble code (DTC) for "ECM/PCM Power Relay Sense Circuit Low". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .P068A – ECM/PCM Power Relay De-Energized Performance - Too EarlyThis trouble code is usually not something to worry about, just clear it. We've seen it pop u...P2510 Code: Causes and fixes, ecm/pcm power relay sense circuit range/performance. If your car has the OBD-II, then this code problem is something your vehicle can suffer. Of course, cars created by manufacturers within the year 1996 till this present moment are no exception. You’ll get the P2510 code when the engine control …Ford Raptor Forum - PCM Power relay - Hi everyone, My 2012 Raptor is causing me issues with the battery. When I turned off the truck, the battery is dead after several minutes. I'm having this problem for about a year. I brought my truck to a Ford dealership and they keeps it for 4 months and never detected the issue....The 2003 Ford Taurus has 2 different fuse boxes: Passenger compartment fuse panel diagram. Power distribution box diagram. Passenger compartment fuse panel. 1. 2. 4. Type. No.FORD EDGE ENGINE COMPUTER RELAY LOCATION REPLACEMENT. ECU PCM DME FUSEIf the Engine Computer ECU PCM does not work and you are trying to find where the Engin...“Half of what we will teach you in medical school is right, and half of it is wrong – the problem is we don’t know which is which.” This quote, or some variation of it, is relayed ...In order to work properly, the PCM is supplied with power by a relay, which uses a battery voltage signal, a ground signal, and an ignition switch input signal. The voltage in the …About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Other Names: Fuel Pump Relay, HVAC Blower Motor Relay, Horn Relay, Starter Relay, Accessory Power Relay, Powertrain Control Module Relay, Window... More Names Replaces: FOAZ-14N089-A, GU5Z-14N089-G285K views 4 years ago. On this episode of Fear No Fix, Chris and ChrisFix team up to diagnose a PCM Relay issue and replace it in a 5.4L Ford F-150 (model …Step 2 - Check the new module. Purchase the new module based on your findings. Don’t install the new module without comparing it with the existing module. The connectors and mounting locations should match. Most places will not accept a module as a return item once it has been plugged in.P068A ECM/PCM Power Relay de-energized to early. Jump to Latest Follow. 81K views 14 replies 11 participants last post by sick350 Feb 25, 2017. Flyin' Hawaiian Discussion starter. 644 posts · Joined 2008. #1 · Mar 17, 2011. Have a 6.7 that has this code, H&S Tuned, went to start truck just clicked....thought the batteries were toast charged ...P2510 is a diagnostic trouble code (DTC) for "ECM/PCM Power Relay Sense Circuit Range/Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic ...Import Direct Ignition 20 Amp 4 Terminal Multi-Purpose Relay - 25-0183. Shop for the best Powertrain Control Module Relay for your vehicle, and you can place your order online and pick up for free at your local O'Reilly Auto Parts.ford4life76 Discussion starter. 139 posts · Joined 2012. #3 · Apr 19, 2013. as far as the grounds are concerned and batt. connections. all looks great. 2001 F350 7.3 Dp f6,air dog II, htt BBturbo, 200/100 hybrids,6637,Foil delete,CCV,5" exhaust, built tranny. 4" Lift 37" toyo m/t, Mile marker Hubs. F.The P0690 fault code refers to the Electronic Control Module (ECM) Power Relay Sense Circuit being high. This means that the ECM is detecting a high voltage in the power relay sense circuit. The powertrain relay is a normally open relay that is held in the open position by spring tension. Battery positive voltage is supplied directly to the ...Advertisement Skywriting dates back to World War I, when England's Royal Air Force (RAF) used it in military operations. Sources report multiple applications, including forming a c...Oct 18, 2016 · Auxiliary relay box 4 is located behind left side of instrument panel. Relay box 5 Ford F150 1999-2003. Auxiliary relay box 5 is located behind right side of instrument panel. Bi-fuel relay module. Bi-fuel relay module is located in left rear of engine compartment. Primary battery fuses (megafuses) F150 1997-1998. Depending on the application, the TCR may be located in the intelligent power module (IPM), which is basically a smart fuse box, or in a standard fuse box. An example of a transmission control relay. (Courtesy: ALLDATA) Code P0888 indicates the TCM has detected a problem with the transmission control relay and/or circuit.So, the (ASD) relay will be shut-down. And, that means the 12-volt power supply to the (ASD) relay will be deactivated, by the (PCM). As a result, of the ignition key being left in the ON position. But, only if the engine has not been running, for approximately 1.8 seconds. Automatic Shutdown (ASD) Relay – Function – Failure – TestingFeb 27, 2023 ... Power at PCM power relay, power to switch side but not at the coil side fuel relay in engine fuse box, no blown fuses, swap around relays ...Inspect the ECM/PCM power relay: If the fuse is not the issue, inspect the ECM/PCM power relay. Look for any signs of damage or corrosion. If you find any issues, replace the relay. Test the ECM/PCM power relay: Use a multimeter to test the ECM/PCM power relay. Follow the manufacturer’s instructions to ensure proper testing.This is a 2.0 Ford titanium flex fuel All power and grounds were checked that let us to believe that there was an internal failure in the PCM put another PCM in it it is still not sending a ground to activate the relay . Dtc in the BCM are u0100 and u0131 and b10e5 . Ford Mechanic: Chris (aka- Moose)The fifth wire is the power relay sense circuit. It is used by the PCM to monitor power relay voltage. If the PCM detects an open power relay sense circuit, a code P0688 will be stored and a malfunction indicator lamp (MIL) may be illuminated. A typical PCM powertrain control module, opened up:P0685. Hi Piloteers, I’m having trouble locating which relay I need to replace. My 2008 Pilot EXL is throwing code P0685 “ECM/PCM Power Relay Control Circuit/Open”. My fuses all look OK but I can’t seem to figure out which relay needs replacing. The issue is that occasionally the radio, navigation, and interior electronics cut out at ...PCM Relay Location by Harryca » Fri Sep 08, 2023 3:03 pm I have a 2007 mk7 RWD 2.4 tdci that I want to replace the PCM relay on (stab in the dark to try and fix a longstanding issue).PCM – keep alive power, PCM relay coil, canister vent solenoid [3.7L, 5.0L and 6.2L engines] Fuse MINI . 20A: 27: Fuel pump relay power. Fuse MINI . 10A: 28: Upfitter 4 [SVT Raptor] Fuse MINI . 10A: 29: ... PCM – Voltage power 2 (General powertrain components, Mass air flow/Intake air temp sensor) [3.7L, 5.0L, 6.2L engines]Ground for the pcm relay is supplied by the pcm pin 33brn/wht. Fuse 39 supplies power into the relay for both the coil and load (terminal 86 30) which should be hot at all times. Pcm pins 2 4 6 are ground from ground 103. Yes, I have 12v at 76 (12.6ish).Fuse 39 is good and has 12v .Jul 6, 2021 · PCM Power Diode (which, when power is applied, energizes the PCM Power Relay which then supplies power to the parallel fuses F18, F23, and F24. You have an open circuit on the load side of F30. Start by inspecting the fuse's finger contacts for damage or corrosion. Continue on down the line until the open is found so you can fix it. Locate the PCM power relay and hold it in your fingers or listen with a stethoscope. If there is an audible click, when the ignition switch is turned on, begin testing with the PCM output terminal. Check for battery voltage at the primary input terminal of the PCM power relay. Consult the wiring schematic, connector view, or pin-out chart from ...Advertisement The power plant produces three different phases of AC power simultaneously, and the three phases are offset 120 degrees from each other. There are four wires coming o...Solid-state relays use light-emitting diodes and light-sensitive semiconductors to turn on and off outgoing power. Usually, a lower voltage switching circuit controls a higher volt...Aug 20, 2016 ... 2012 Renegade 800r with *P0686 ECM/PCM Power Relay Ctrl Circ Low ... My 2012 renegade 800 has been throwing this code for a while and now it won't ...When code P068A is stored, it indicates that the engine/powertrain control module (ECM/PCM) has detected a flaw in the de-energizing procedure for the relay that supplies it with voltage. In this case, the relay has de-energized prematurely. The PCM power relay is utilized to safely apply battery voltage to the appropriate PCM circuits.My Battery is currently 12.1v in the morning, so I'm ordering a new battery to rule out low power affecting the PCM/ECU. My initial query in my first post was that is the under hood fuse/relay box is not the normal one seen in all the manuals and on the web for my model and year, whereas all documentation shows this type (see pic below).PCM (Powertrain Control Module) relays can be of various types depending on the specific application and vehicle make/model. Some common types of PCM relays include: Fuel Pump Relay. These relays control power to the fuel pump that delivers fuel from the fuel tank to the engine.The automobile fault code P0686 indicates a problem with the Engine Control Module (ECM) power relay. This can result in the engine light being illuminated or the service engine soon warning light appearing. The most common causes of this fault code are a weak battery with low voltage while cranking, a faulty ECM power relay, an open or shorted ...Ford TSB 19-2294. For 2017-2019 F-Super Duty and 2016-2019 Explorer/Police Interceptor Utility vehicles, a terminal repair kit for pins 1 and 2 of the powertrain control module (PCM) power relay inside of the battery junction box (BJB) is now available. It is no longer necessary to replace the entire BJB.Radio capacitor(s), Ignition coil, Powertrain Control Module (PCM) diode, PCM power relay, Auxiliary PCM (APCM) (Diesel engine only) 9: 30: Wiper control module, Windshield wiper motor: 10: 20: Main light switch, Park lamps, License lamp (external lamps), Multi-function switch (flash-to-pass) 11: 15:Accessory Power Relay. Fuel Pump Relay. Powertrain Control Module (PCM) Relay. Volkswagen GTI. Genuine Volkswagen Part - 191906383C (191-906-383-C, 191906383). …How do you know if a PCM relay is bad? There are a few signs that indicate a bad PCM relay. The most common symptom of a faulty PCM relay is engine stalling. Other symptoms include issues with the fuel pump, headlights, and power windows. If you suspect a bad PCM relay, testing it with a multimeter is the best way to confirm the issue.When the power goes out, you probably reach for a flash light—that is, if you can remember where you put it, find your way in the dark, and hope you remembered to change the batter...Indoor games for kids range from making a nature-inspired board game to a dress-up relay race. Learn more about indoor games for kids. Advertisement Indoor games for kids let kids ...Vodacom had offered to pay Makate about $3 million but the inventor is demanding over $1.2 billion in compensation, arguing that the figure constituted 5% of revenue from the group...In the 2000 Ford F-150, the PCM fuse and relay are located in two separate fuse boxes. In the under-dash fuse box, you’ll find fuse number 2, 20 and 30, which is assigned for the PCM power fuse. In the under-hood fuse box, there is a specific fuse labeled as fuse number 18 is designated for the PCM. Additionally, Relay 304 is …Powertrain Control Module (PCM) Power Diode, Ignition Coils: 25: 8: Lighting Control Module, Power Mirrors, Remote Keyless Entry, Clock Memory, Radio Memory, Electronic Automatic Temperature Control (EATC), Power Seats (1998), Power Windows, SecuriLock, PATS (1999-2000) ... PCM Power Relay, PCM: 30: 13: High Speed Cooling Fan Relay: …Jul 29, 2011 ... Pin 8 from the PCM sends power to the fuel pump relay. We are using a volt/ohm meter. We tested contentuited etc at the wire. We removed the ...Fuel pump relay: R5 : Horn relay: R6 : PCM power relay . Power distribution box 1999-2003 Ford F150. Fuse box diagram (1999 model year). Assignment of the fuses (1999). Fuse/Relay. Location. Fuse Amp Rating. Description. 1. 25A * Power Point. 2. 30A* Powertrain Control Module. 3. 30A* Headlamps/Autolamps. 4. 15 A*. Air Suspension. 5.P0690 is a diagnostic trouble code (DTC) for "ECM/PCM Power Relay Sense Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .The automobile fault code P068A indicates a problem with the Engine Control Module (ECM) relay or the ECM itself. The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light. The cause of this fault code can be a faulty ECM relay, a faulty ECM, an open or shorted ECM harness, or a poor electrical connection in ...honda power steering problem solutionhonda power relay stuck off solutionpower relay locationfault code p1567 fixfault code 34-05 fixfault code c1850 fixfa...About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Standard Ignition 30 Amp 5 Terminal Multi-Function Relay - RY30. Part #: RY30. Line: STD. Check Vehicle Fit. Powertrain Control Module (Pcm) Relay. Limited Lifetime Warranty. Terminal Type: Blade.Oct 18, 2016 · Auxiliary relay box 4 is located behind left side of instrument panel. Relay box 5 Ford F150 1999-2003. Auxiliary relay box 5 is located behind right side of instrument panel. Bi-fuel relay module. Bi-fuel relay module is located in left rear of engine compartment. Primary battery fuses (megafuses) F150 1997-1998. The powertrain control module is the central module of your vehicle. It receives and processes all the signals sent by the various sensors related to the engine’s powertrain. Besides, it also coordinates all the other modules, like the transmission control module and the body control module, and makes sure they “talk” to each other.Power Train Control Module (PCM) Power Relay, Coil-on -Plugs, Radio Noise Capacitator, Passive Anti-theft System (PATS) 9--10: 10: Rear Window Defrost: 11--12--13: 5: Radio: 14: 10: Traction Control Switch, Anti-lock Brakes (ABS), Instrument Cluster: 15: 15:OBD II fault code P0685 is a generic code that is defined as “ECM/PCM power relay -circuit open”, and is set when the PCM (Powertrain Control Module) detects that its own power supply has failed, or if it detects a low voltage in the circuit that supplies it with power. Note that this code only applies to applications that use a relay to ...PCM Power Relay. Relay . 31: Blower Motor Relay. Relay . 32: Two Speed Fuel Pump Relay [Gasoline only], Injector Driver Module Power Relay [Diesel only] Relay . 33: Washer Pump Relay. Relay . 34: Windshield Wiper Park/Run Relay. Relay . 35: Windshield Wiper HI/LO Relay. Diode ATO . 37: PCM Relay Diode. Relay . 38: Trailer Tow Backup Lamp …A P068A should be categorized as severe and addressed accordingly. It may result in a no start condition and/or a variety of drivability issues. How to easily diagnose, repair, and info on causes of a P068A trouble code that indicates a detected performance problem in the ECM/PCM power relay which is de-Energizing too early.What is a PCM relay and how does it work? A PCM relay is an electromechanical device that controls the power supply to the Powertrain Control Module in vehicles. It functions as a switch, activated by the ignition to supply or cut off power to the PCM. How can I tell if my PCM relay is failing?Aug 4, 2023 · Ground for the pcm relay is supplied by the pcm pin 33brn/wht. Fuse 39 supplies power into the relay for both the coil and load (terminal 86 30) which should be hot at all times. Pcm pins 2 4 6 are ground from ground 103. Yes, I have 12v at 76 (12.6ish).Fuse 39 is good and has 12v . New to the forum, and excited to be here! I have a 2008 F350 (6.4 model) and cannot connect with the PCM via scanner. Through troubleshooting, I have discovered the PCM is also not powering on (Relay 53 not getting close signal) If I jump Relay 53, the TCM powers on but this tells me I'm not getting a signal from the PCM to activate this relay.When it comes to heating solutions, professionals in the industry know that reliability is key. One product that consistently delivers on this front is the Erie Boiler Zone Relay. ...PCM – keep alive power, PCM relay coil, canister vent solenoid [3.7L, 5.0L and 6.2L engines] Fuse MINI . 20A: 27: Fuel pump relay power. Fuse MINI . 10A: 28: Upfitter 4 [SVT Raptor] Fuse MINI . 10A: 29: ... PCM – Voltage power 2 (General powertrain components, Mass air flow/Intake air temp sensor) [3.7L, 5.0L, 6.2L engines]The power side of the PCM and IDM relay control coils is fed thru fuse 30 which is hot with the key on. If you want to check the ignition switch, turn the key to run and check continuity between terminal B5 and I1. The I1 terminal is the output to the hot in run circuit that feeds fuse #30 thru a red/black wire.PCM power relay, PDB fuse 27: 10: 60: Auxiliary battery relay (gasoline engine only), PDB fuses 8 and 24: 11: 50: IDM relay (diesel engine only) 12: 60: Engine compartment fuses 3, 5 and 26, 23 (diesel) Instrument panel fuses 26 and 32, PCM start relay: 13: 50: Blower motor relay (blower motor) 14: 30* 40The 2003 Ford Taurus has 2 different fuse boxes: Passenger compartment fuse panel diagram. Power distribution box diagram. Passenger compartment fuse panel. 1. 2. 4. Type. No.Crownvic.net! Make payments with PayPal - it's fast, free and secure! registry | CVN ...The control circuit is activated by the ignition switch (pin 86) and the ground (pin 85). The permanent battery voltage is supplied by pin 30 as usual, and the high output voltage is delivered to the PCM by pin 87. The pin 87a is used by the PCM to monitor the relay voltage at all times. The OBD2 code P0690 is stored in memory when the PCM ...Step 2 - Check the new module. Purchase the new module based on your findings. Don’t install the new module without comparing it with the existing module. The connectors and mounting locations should match. Most places will not accept a module as a return item once it has been plugged in.Check the power relay: The P068A code can be caused by a faulty power relay. Use a multimeter to check the power relay’s resistance and continuity. If the power relay is faulty, replace it with a new one. Inspect the ECM/PCM: If the above steps do not resolve the issue, inspect the ECM/PCM for any damage or corrosion. The automobile fault code P068A indicates a problem with the Engine Control Module (ECM) relay or the ECM itself. The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light. The cause of this fault code can be a faulty ECM relay, a faulty ECM, an open or shorted ECM harness, or a poor electrical connection in ... There is no keep alive power PCM relay. This is simply a alwasy hot ciruit that keeps the power to the PCMs mempry banks. The PCM relay is switched on every time when the ignition is turned on. This in turn powers the PCM processor and an internal 5V power supply that then powers the two wire 5V sensors. Paul Nimz.Some of the symptoms of a bad powertrain control module are. 1) Illuminated check engine light. The check engine light only turns on if the ECM ( Engine control module ) is analyzing the data it receives not up to standards. 2) Intermittent cylinder misfires. The crankshaft position sensor, for example, relies on the condition of the ECU so ...The P2509 code is related to the power input signal of the Engine Control Module (ECM)Powertrain Control Module (PCM). When the ignition switch is turned on, the battery voltage is applied to the ECMPCM through the main relay. If the ECMPCM power input is out of factory specifications, the ECMPCM will set the OBDII code, indicating an ...Save on Powertrain Control Module Relay at Advance Auto Parts. Buy online, pick up in-store in 30 minutes.Fault code P068A – ECM/PCM power relay de-energized performance – too early. Author AutoNevod Reading 6 min Views 383. Contents. Technical description and explained code P068A; ... Most PCM power circuits are relatively simple and straightforward. When the ignition is turned to the “ON” position, power is applied to the relay. ...

The third circuit is usually responsible for carrying a signal from the ignition switch. There’s a fourth wire that supplies voltage to the PCM when the relay is grounded and closes. If the PCM detects a high voltage condition on the power relay sense circuit, it will store the code P0690 and illuminate the check engine light.. Target red card credit score

pcm power relay

Ford Explorer (2002-2005) fuses and relays. In this article, we consider the third-generation Ford Explorer (U152), produced from 2003 to 2005. Here you will find fuse box diagrams of Ford Explorer 2003, 2004 and 2005, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout ...May 7, 2011 ... The car has been running fine until yesterday when it died without warning on the highway. It would turn over and act like it wanted to start, ...3. Test the PCM Power Relay. If your Pilot won’t start and the relay is getting both power from the battery line and the keyed power (with a solid ground), it’s time to suspect the PCM power relay itself. Here’s a good video on how to test a relay. It’ll also give you a basic understanding of how they work if you’re having trouble ...Ford Ranger Fuses and Relays Diagram (1998 – 2000) by Car GuruDecember 22, 2020. 4208 4018 3. 1. Here you will find Fuses and Relays diagrams for the Ford Ranger of 1998, 1999 and 2000 production years. Information about the location of the fuse panels inside the car and the purpose of each fuse and relay.The OBD-II fault code P068A means that the PCM Power Relay is de-energized too early, causing a variance in voltage and resulting in a hard or no start in co...(Using the attached 2002 F-Series Powerstroke Schematic, I assume the IDM relay only supplies 12V (no ground thru the relay) to the IDM module, which controls power to the glow plug relay and injectors as needed. We're trying to determine: 1) Where the possible short in the PCM relay harness might be. And, 2) If the PCM is still good.CHEVROLET SILVERADO ECU RELAY, ECM RELAY, PCM RELAY LOCATION 2006 2007 2008 2009 2010 2011 2012 2013If you have Chevrolet Silverado / Chevy Silverado and …Conclusion. P0685 is usually caused by a bad relay or the circuits running to the relay. Good luck fixing your Ford F350. P0685 is a somewhat rare OBDII trouble code. It's a general code, so it has the same meaning for the Ford F350 as any other vehicle. It indicates that the circuit that provides power to the PCM is not functioning properly.Step 1 - Locate the PCM. Locate the PCM and record the module and Strategy Code numbers. Figure 1. Locate the PCM and record the numbers. Step 2 - Check the new module. Purchase the new module based on your findings. Don’t install the new module without comparing it with the existing module. The connectors and mounting …Fuel pump relay: 5: Horn relay: 6-PCM power relay: Advertisements. Primary battery fuses (megafuses) (1997) Location Amperage Description; 1: 175: Power Network Box Megafuse: 2: 175: Alternator Megafuse: 3: 20: Alternator Field Minifuse: Engine mini fuse box (1997) Slot Number Amp Rating Circuits Protected; 1: 5 amp: Powertrain Control Module ...2003: PCM power relay; 2004: PCM power relay or NGV module (natural gas vehicles only), Diagnostic connector, PDB 19 and 20, A/C clutch relay, Fuel pump module relay: 106: 40A: Anti-lock Brake System (ABS) 107: 40A or 50A: 2003 (40A): Crown North America (Police veliicle option);The control circuit is activated by the ignition switch (pin 86) and the ground (pin 85). The permanent battery voltage is supplied by pin 30 as usual, and the high output voltage is delivered to the PCM by pin 87. The pin 87a is used by the PCM to monitor the relay voltage at all times. The OBD2 code P0690 is stored in memory when the PCM ....

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