2003 GMC Sonoma Extended Cab "ecm pcm power relay" Questions

...PCM and one from the ECM B fuse. See diagram below. If the power is there, are you sure it's the fuel pump relay that you hear clicking? If there are other relays in the box, it may be one of them ...

ECM.. By the way my vehicle is 2002 GM Sonoma 2.2 liter engine. Maybe the oil pressure sensor or switch that keeps the pump running after engine started. If you jumped 87 and 30, it should have turned

...ECM/PCM code. What should I do P0688 (generic) = ECM/PCM Power Relay Sense Circuit /Open P0688 DODGE - Auto Shutdown Relay Control Circuit Low Check all the ECM fuses, if the fuses are OK try ...

...Start at the ecm/pcm relay. The ecm/pcm is what runs the engine and sends the data to the instrument panel. Most likely the relay gets to hot and cuts out, thus not sending any power to the

...ECM/PCM Controlled) Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM ...

...ECM and PCM The car has power, but will not even try to kick over If you still have your owner's manual, check the location of the fuse(s) and relay(s) for the ECM and PCM. Try replacing the fuse(s) ...

...ECM/PCM Power Relay Control Circuit Open." The powertrain relay typically stays in the open position, and battery voltage constantly goes to the relay.Feb 28, 2022 P0685 Code: ECM / PCM Power Relay ...

...pcm is bad. need help. its driving me nuts!!!!! many fuel pumps get there power from the relay that is energized by the ECM there is a pressure regulator in the system that will report to the ECM to ...

...pcm/ecm has gone bad Hooking up a scan tool an seeing if it will communicate with the PCM/ECM , checking for code's . Checking power an ground circuit's to the PCM/ECM . What problem or problems are ...

ECM but go straight from the pressure regulator to the relay through a fuse Never replace a Ford PCM (ECU) they rarely go bad and are very expensive. The fuel relay is momentary on initial start up to