Pcm power relay

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 ...

Pcm power relay. 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 ...

When it comes to automotive repairs, the term “rebuilt PCM” is often thrown around. But what exactly does it mean? In this article, we will dive into the basics of a rebuilt PCM an...

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.P0690 Code: ECM/PCM Power Relay Circuit High. P0683 Code: Glow Plug Control Module to PCM Communication Circuit. P0689 Code: ECM/PCM Power Relay Sensor Circuit Low. P2509 Code: PCM Power Input Signal Intermittent. File Under : Maintenance, DIY Tagged With : engine-control-module. Subscribe. Notify ofP068A 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 ...If there’s no constant voltage at the connector of power relay, then try to repair/replace the fusible links. If the input supply voltage is present, test the connector pins’ performance on the right side. Less power supply indicates a faulty relay. Test the output circuit if the output voltage of the power supply (PCM) is high.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 ...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 – Testing Pull the PCM Power Relay from the Battery Junction Box and set it aside. Pull the Blower Motor Relay from the Battery Junction box and insert the pulled relay into the PCM Power Relay position. Reconnect the battery cable. Turn the ignition key to On and see if "CHECK ENGINE" is illuminated. 7. 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]

Feb 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 ...Sep 25, 2020 ... Did any fuses blow and which ones? There's an inertia switch behind the passenger side kick panel which kills power to the fuel pump if tripped.Jan 7, 2016 · A bad PCM-power relay may cause the vehicle to crank, but not start, or sometimes not even crank at all. 3. Battery Drain or Dead Battery. The final bad ECM relay symptom is a battery drain or dead battery. If the relay shorts it can leave power on to the computer, even when the vehicle is turned off. This will place a parasitic drain on the ... Shop Volkswagen Passat Accessory Power Relay. Powertrain Control Module (PCM) Relay. AC. ENGINE ENGINE, COMPARTMENT - OEM Volkswagen Part # 1K0906381 (1K0-906-381) 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 .

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?BlueDriver. 71.4K subscribers. Subscribed. 1.6K. 285K 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...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 ...The fault code P0685 in an automobile can be caused by various factors. One possible cause is a weak battery, resulting in low voltage while cranking. Another potential cause is a faulty Engine Control Module (ECM) power relay or an open or shorted ECM power relay harness. Poor electrical connection in the ECM power relay circuit or a blown ECM ...

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Power Supply Relay (J271/J317) faulty; Possible Solutions. Check Fuse(s) Check Wiring and/or Connector(s) from/to Power Supply Relay (J271/J317) Check/Replace Power Supply Relay (J271/J317) Special Notes. A weak Battery may set this fault code. Insure the Battery voltage is at least 11.5v. 2009-2014 Audi vehicles with no start issues, please ...What Is PCM Power Relay? What Is a Power Relay Module ? What Is Reverse Power Relay? Conclusion. What Is a Power Relay? It is a switch that comes with an …“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 ...The #2 5amp relay is according to the owners guide F-150/250 1999 model year is the Powertrain Control Module (PCM) Cluster. When I turned the truck off last night after installing a new relay I look this morning relay clicking and all electric was off including the Pats light, checked my battery, 12.67vdc.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 ...

The P068A trouble code stands for “ECM/PCM Power Relay De-Energized Performance – Too Early.” This is an uncommon code, and it doesn’t appear on many …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?“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 ...3. Test the PCM Power Relay. If your Element 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 ...16 Ga 20 Ga. Starter Motor Relay. Ford Econoline Fuses Description, Ford Econoline Fuse Location, Ford Club Wagon Fuses Description. Print Page. Location and description of fuses and relay Ford Econoline, Club Wagon with engine 4.9L Truck Six & Windsor, 5.8L Windsor, 7.5L 385 Family or Diesel 7.3L Navistar (E150, E250, E350; …14152 posts · Joined 2008. #2 · Jun 1, 2018. Oh, that's not a good code to have. The service manual does say to check for loose terminals at the "IGP line connectors" so it means checking the IGP (Power Source) for the PCM which is Connector B, terminal number B3, a yellow/black wire at the PCM. Unfortunately, if the power feed to the PCM is ...Save on Powertrain Control Module Relay at Advance Auto Parts. Buy online, pick up in-store in 30 minutes.Oct 10, 2022 · FORD F150 PCM RELAY, POWER TRAIN RELAY LOCATION REPLACEMENT F 150 ECU RELAY, ECM RELAY 2015 2016 201If you need to find the PCM relay, ECU relay, ECM, Powert... Jul 26, 2013 · 02 7.3 PCM not responding. currently working on a 2002 f250 with a 7.3 in it. customer was driving down the road and truck shut off and will not start since, crank but no start. has edge evolution installed in it and chip says pcm not responding, so unplugged that and hooked up scan tool and still no pcm connection. so made sure there was power ... Get some tips to help diagnose a failed module quickly and accurately. When you get a PCM communications trouble code on your IDS scan tool, start here.Diag...

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.

FORD F150 PCM ECU ECM RELAY LOCATION REPLACEMENT F 150 ENGINE COMPUTER RELAY 2009 2010 2011 2012 2013 2014If you need to find the engine computer relay, ECM ...Inspect the PCM power relay circuit. You should obtain a wiring diagram for the exact model year and engine combination for your Honda Pilot. Most PCM relay terminals have 5 pins (covered above in the definition section). Is the relay getting a constant power supply from the battery? If it is not, you will need to trace the harness …To function properly, a relay supplies power to the PCM through voltage signals from the battery, ground signals, and ignition switch input signals. Therefore, it is normal for the relay coil control circuit to have a low voltage. The PCM’s fault detection circuit detects voltage from the relay when you see trouble code P0685.Diagnostic code for P068A (Active/Static) ECM/PCM Power Relay. De-Energized Performance - Too Early. I have been trying to locate J271, which I believe is the power relay in question. The way I am looking at it, if it. had been the battery, then it would not have started after multiple tries. 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 . Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. 1 (855) 347-2779 · [email protected]. Read FAQ. GET A QUOTE. Chevrolet Silverado 1500 ECM-Power Relay Replacement costs starting from $117. The parts and labor required for this service are ...Jan 7, 2016 · A bad PCM-power relay may cause the vehicle to crank, but not start, or sometimes not even crank at all. 3. Battery Drain or Dead Battery. The final bad ECM relay symptom is a battery drain or dead battery. If the relay shorts it can leave power on to the computer, even when the vehicle is turned off. This will place a parasitic drain on the ... Get some tips to help diagnose a failed module quickly and accurately. When you get a PCM communications trouble code on your IDS scan tool, start here.Diag...About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...

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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.A P0690 code can have a variety of causes, but the most common are: Faulty ECM/PCM relay. Blown ECM/PCM fuse. Bad ECM/PCM grounds. Bad battery. Faulty battery …An investor's buying power is equivalent to the money that you have in your cash account with your broker and the loan value of the securities held in your margin account. The type...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 assigned to the ...A stored code P0885 simply means that the PCM has detected an open condition in the power relay control circuit for the transmission control module (TCM). Open could be translated as disconnected or cut for diagnostic purposes. Usually the TCM is integrated into a single housing with the engine control module (ECM).3. Test the PCM Power Relay. If your Accord 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 ...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 ...Power Train Control Module (PCM) Power Relay, Coil-on -Plugs, Radio Noise Capacitator, Passive Anti-theft System (PATS) 9 ...In the world of high-fidelity audio systems, PCM (Pulse Code Modulation) is a widely used method for audio encoding and decoding. PCM is a digital representation of analog signals ... ….

Here is a more detailed list of the signs of a bad or failing powertrain control module to look for: 1. A Check Engine Light. The first sign that your PCM is having issues is likely going to be a check engine light. The light could be for anything related to the powertrain.(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.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.1987 - 1996 F150 & Larger F-Series Trucks - 95 f150 pcm relay ghost volts! Solve the mystery - Hey all. Here's a good one. With the pcm and fuel pump relays out of the circuit and KOEOFF,, PCM SOCKET PIN87 AND FUEL SOCKET PIN 85 (which are directly connected) BOTH HAVE 2.7 VOLTS, ALONG WITH ALL OF THE OTHER SENSORS ON...In the end, if you are not getting power to the fuel pump relay, in most cases, it’s either a bad fuse or a faulty ECM. So, that’s where you should start your investigation. Check all the fuses in the cabin fuse …The sense circuit lets the PCM monitor the voltage at the PCM power relay. When your Chrysler 200 has P0688, it has detected an open circuit. If there is an open detected between the PCM and the PCM power relay, you’d have P0685. An open circuit is a circuit that has not been completed. It means that no power is flowing through the PCM power ...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. This can indicate a problem with the relay or its circuit. 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 illuminated check engine light, the vehicle refusing to start, and the vehicle stalling. HONDA ACCORD POWERTRAIN RELAY LOCATION, PCM RELAY, POWER TRAIN MODULE RELAY 2008 2009 2010 2011 2012If you have Honda Accord and you want to see where the PC...HONDA CRV CR-V PCM RELAY LOCATION, POWERTRAIN RELAY 2012 2013 2014 2015 2016If you have Honda CRV CR-V and you want to see where the PCM relay, powertrain re... Pcm power relay, The 1998 Ford F-250 has 4 different fuse boxes: Instrument panel fuses diagram. Power distribution box diagram. Primary battery fuses (megafuses) diagram. Engine minifuse panel diagram. Ford F-250 fuse box diagrams change across years, pick the right year of your vehicle: Instrument panel fuses. R2., 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)., 30A PCM power relay: 3: 20A Fuel system, anti-theft system: 4: 20A Headlamps: 5: 30A ABS system: 6: 30A ABS system: 7: 20A Trailer park LP and trailer stop LP: 8: 30A Battery saver relay and headlamp relay: 9: 50A Blower motor: 10: 30A Power locks, power windows and power: 11: 20A PCM memory and: 12: 50A Air ride control relay: 13:, May 29, 2019 ... The P0688 is for the PCM to monitor if the ASD relay is turning on. The ASD relay is in the TIPM and will turn when the PCM wants the Jeep to ..., The Power Relay is used to supply voltage to the PCM, in other words, it’s function is to deliver to the powertrain control module the adequate battery voltage needed for its operation. This contact type relay uses the traditional 5-wire design. The control circuit is activated by the ignition switch (pin 86) and the ground (pin 85)., 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 ..., request of each device and system, the power supply is automatically disconnected (self-shutdown function). The PCM power is disconnected by controlling PGM-FI Main Relay 1. During a normal PCM shutdown, the shutdown process is executed by the CPU, PGM-FI Main Relay 1 is turned off, and the voltage to the PCM is turned off to shut …, 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., 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 …, 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 . , 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:, 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 . , 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 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 ..., Windows/Mac/Linux: Vidalia, a free, open-source, cross-platform application, makes setting up and configuring Web proxy tool Tor a snap, allowing you to surf the internet anonymous..., 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 ..., The fifth wire is the power relay sense circuit. It is used by the PCM to monitor power relay voltage. If the PCM detects a low voltage condition on the power relay sense circuit, a code P0689 will be stored and a malfunction indicator lamp (MIL) may be illuminated. A typical PCM powertrain control module, opened up: , 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 fault code P0685 in an automobile can be caused by various factors. One possible cause is a weak battery, resulting in low voltage while cranking. Another potential cause is a faulty Engine Control Module (ECM) power relay or an open or shorted ECM power relay harness. Poor electrical connection in the ECM power relay circuit or a blown ECM ... , HONDA ACCORD POWERTRAIN RELAY LOCATION, PCM RELAY, POWER TRAIN MODULE RELAY 2008 2009 2010 2011 2012If you have Honda Accord and you want to see where the PC..., Fuel pump relay should have 4 wires. 1. Tan/green or Blue/orange is the PCM control wire, only a ground for a few seconds after key is turned on, from pin22 on PCM. 2. Red is power usually from from the EEC power relay (key on) 3. Brown or Green/orange is wire to inertia switch (then fuel pump) 4., Do not probe the contacts for the fuses and relays in the power distribution box as damage will occur, causing improper, or loss of, electrical functionality. ... Powertrain control module (PCM) keep-alive power: 24: 10: 2011-2014: Brake on/off power: 25: 10: A/C compressor relay: 26: 20: Left high intensity discharge headlamp relay: 27: 20:, 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., 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..., The 2010 Ford F-150 has 2 different fuse boxes: Passenger Compartment Fuse Panel diagram. Power Distribution Box diagram. Ford F-150 fuse box diagrams change across years, pick the right year of your vehicle: Passenger Compartment Fuse Panel. 48., So, for clarification with diagram in view Pin 18 to Pin 52 = Wake Up signal from BCM Primary (Lazy Circuit) that is killing all power to Lights etc. Run Start Relay - Secondary Power, From Key Cycle - Powers the PCM (ISP-R) Pin 64 Pin 64 - Allows / Triggers the Ground to the PCM Power Relay (PCM - Pin 25) Normal Operation = Wake …, Fuel pump relay should have 4 wires. 1. Tan/green or Blue/orange is the PCM control wire, only a ground for a few seconds after key is turned on, from pin22 on PCM. 2. Red is power usually from from the EEC power relay (key on) 3. Brown or Green/orange is wire to inertia switch (then fuel pump) 4., Edge Member. 2. Posted August 11, 2017. I have a 2007 SEL and it has had this problem for the last few months. The PCM power relay ticks after you turn the key off. The TPS also ticks in time with the relay. Unplug the relay and plug it back in and it stops. I've researched this problem and have heard causes were anything from a weak ground to ..., Order Ford F150 Relay - Powertrain Control Module online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store., 1987 - 1996 F150 & Larger F-Series Trucks - 95 f150 pcm relay ghost volts! Solve the mystery - Hey all. Here's a good one. With the pcm and fuel pump relays out of the circuit and KOEOFF,, PCM SOCKET PIN87 AND FUEL SOCKET PIN 85 (which are directly connected) BOTH HAVE 2.7 VOLTS, ALONG WITH ALL OF THE OTHER SENSORS ON..., It was a Saturday, so they were closed. August 10, 11, 2015, mileage 42,800: Dealership tries to start the truck and it starts right up. The dealership says the computer diagnosed the problem as a bad PCM Relay (Part no. F-F80Z14N089AA). I'm not sure how bad it could be if the truck started before they worked on it., 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., 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.