#2010 CHEVROLET COBALT FUSE BOX HOW TO#

If you have to ground your TCM through the body it is a symptom of a growing problem, not the permanent solution. Splice them together/check it isn't broken along it's path. This is the positive power wire for both. If this still doesn't fix your issue, there is a white/red wire that goes to both the ECM and TCM.

If this doesn't fix your issue, trace the grounds back to their sources and make sure they aren't broken along the way. Make sure the wire isn't brittle and breaking, corroded, and has good connection. The ground is in 90% of the cases the issue. Two of these grounds go to the ECM and TCM. There are two terminals that are connected to it, one is very thick and goes to the body to act as a secondary ground, and the other has 5 small wires connected to it, that feed back into the main harness. It's on the front of the transmission housing, very accessible other than a thick coolant hose that can get in the way of taking it off, I just man handled it to the side. If you google this ground you will find it grounds MANY important electrical components. The ground wires from the ECM and TCM share the same ground G105(picture of location below). These are the basics you should check before diving in deeper. Make sure your car doesn't have remote start and if it does check the wiring, remote starts can short out weird things, mostly aftermarket we are talking here. The ignition cylinders/switches for these cars are notoriously junk and can cause many weird issues. Check to see if your car has the ignition recall. Have it load tested and make sure it has sufficient charge, weak batteries can make these cars act all sorts of messed up. Moving on, make sure your battery is actually good. Under the hood check your fuse box, and make sure to check all of your relays as well. Check fuses, in the passenger front, on the left near the floorboard there is a panel that goes to your BCM, and it has fuses and connectors.

#2010 CHEVROLET COBALT FUSE BOX HOW TO#

I just wanted to let anyone who has this issue know how to fix it.įirst of all going down the line.

2010 chevrolet cobalt fuse box