Thread: Bad electrical issue? Need help.

Originally Posted by SDGTP99

Does it matter if I unplug the battery current sensor? Cuz I already did and there was no change in the cars problems.

Not sure, frankly im a little vague on what it actually controls, i just know that theres two models depending on the BCM feed voltage.

Originally Posted by stealthee

If the car will start on a jump, then won't start after running then there is a dead cell in the battery.

X2.

Sent from my LG G3

Curious as to how it tested good with a dead cell, the issue your experiencing is the fact that the battery isnt putting out 12v. lol What brand battery was it? If you havent gotten a replacement yet, I recommend a 26R, fits in the battery tray perfectly, but is shorter and not as wide, making it alot easier to get in and out when need be.

Just make sure if you buy one it has the terminals on the correct side.

Originally Posted by SDGTP99

Connections are very tight.

Verify all your grounds are good, you should have one that goes to the block under the front manifold, one on the front of the transmission, and the main ground should bolt over to the trans on the drivers side somewhere, honestly i forgot what the exact location is, ill have to take a look under the hood of my car. What's the condition of everything under the hood? When I bought mine I had massive electrical issues mainly related to the harness itself, mainly from neglectful mechanic work, and just piss poor quality of the loom that GM uses on their harnesses. I had several sections of cut and frayed wire that were merely the result of wear and tear from constantly being exposed to heat and rubbing against the engine. If you have sections of your wiring harness that the loom has corroded and failed, check for frayed wires. The main positive and ground wires coming off the battery also run next to the radiator and in front of the pulley system, and there is a large loom of wire that runs from the fuse block over the belt on the pulley side that could potentially have made contact.

Your main positive and negative cables on the battery are an independent harness from the engine harness itself, heres a few of the connections on the main cables.






and a picture of that harness

Hmmm, at a loss here, only thing I can really think of at this point is a harness problem or a module problem. Only other cheap fix I can recommend is clean every connection at every module (ECU, TCM, BCM, etc) with deoxit 100 to make sure all the connections are solid where they plug in.

http://www.amazon.com/Hosa-D100S-2-D...9NT8B2N32G7JSR

https://www.youtube.com/watch?v=ITBwoFq_zps

Originally Posted by SDGTP99

Got the GXP back today. So far it seems to run great. All the shop did was pull & inspect the wiring harness & check the connections. So, fingers crossed then, yea?

Like i said before, its possible it was a corroded connection and pulling the wiring harness could have alleviated that issue temporarily. I'd clean all the connections with deoxit100 to make sure they are all getting good contact.