Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is***** size engine do you have and what model truck? Thanks.
It sounds like either a problem with the PCM or wiring. Check the voltage at the transmission connector pin E for battery voltage with the key in the run position. If there is battery voltage at pin E, disconnect the Powertrain Control Module (PCM) and then check for battery voltage at the PCM terminal E10 Tan/Black wire. If there is battery voltage on the Tan/Black wire with the PCM disconnected, plug the PCM back in and check to see if the voltage drops on the Tan/Black wire. If the voltage drops when the PCM is plugged in, replace the PCM. If the voltage is still low on the Tan/Black wire with the PCM disconnected, unplug the transmission connector and check the Tan/Black wire from the transmission connector pin T to the PCM terminal E10 for resistance or short to ground as there could be a problem with internal wire harness. Let me know how it goes or if you have more questions, thanks.
No problem, I'll talk to you then. Thanks again and have a good day!
Pin E was a pink wire? If so check to see if 20 amp trans fuse of location 20 on interior fuse box has 12v with key on. Let me know, thanks.
I think your ignition switch has failed which sends this fuse power. There is a white wire that leaves ignition switch and goes to fuse, this wire should also have voltage with key on if not replace ignition switch. If so run a new wire between fuse box and switch. Let me know how it goes or if you have more questions, thanks.
Sounds good, thanks.
Good to hear, keep me updated. Thanks.
Pin E should have 12v. Check to see if fuse has 12v, if so run new wire between fuse and transmission. Let me know, thanks.