Originally Posted by
mikemadeit94
Thanks pizza, I used a ground wire that’s in my trunk for my subwoofer to test. it’s worked fine in the past so I assume that’s a good ground.
I don't assume anything, I verify. Making measurements that might be invalid is a waste of time. I earned a living from 1980 to 2011 troubleshooting electronic equipment to the component level. If your test data is not verified, your test results mean nothing. If you have 12 volts on a wire but test with a meter that has no ground, you will see 0 volts when there is really 12 volts there.
From what is going on I’m still getting 0v on pins suggested in my manual so now I’m guessing I have some failed wiring somewhere? Kind of hard to believe considering this only broke from my rear window seal being bad..
All battery feeds should show 11 to 12.6 volts with the engine off. Give it another 1-2 volts with engine idling.
DO NOT try to measure the wires of the CAN BUS, their readings mean nothing.