weird problem 03 GMC BCM?

[beanpole209]

My truck is hating me pretty bad apparently right now.

The battery light, gear selector, and radio stay on all the time; can't turn them off. I checked (good), my ignition switch and changed it out for the hell of it. And yes its indexed right.

I'm having cluster problems unrelated to this, but I also checked while it was out, and the stereo still has ignition power. Is there some relay, or am I looking at something else like a body control module or something?

 

[Canadian Cowboy]

Is this truck all stock non engine related?
Any aftermarket accessories/electronics?
CC

 

[greywarden]

My truck is hating me pretty bad apparently right now.

The battery light, gear selector, and radio stay on all the time; can't turn them off. I checked (good), my ignition switch and changed it out for the hell of it. And yes its indexed right.

I'm having cluster problems unrelated to this, but I also checked while it was out, and the stereo still has ignition power. Is there some relay, or am I looking at something else like a body control module or something?

hey there bean i just wanna ask how did you resolved this kind of problem now? i am still puzzled what is happening on my truck right now so i need a little help. i did not change any parts from my truck. i did not even touch any wiring or electronics. it just happened now i dont have any idea what to do. i wanna try resolving it first. i will just go to my dealer if i cannot fix it.

 

[jmax33]

could be a bc module, may check your relays under the hood, they can get caroded and make weird things happen, like lights coming on and off by there self and crazy things like that

 

[beanpole209]

Old thread, but I thought I would update it in case anyone else develops this problem.

History on the problem's: it was doing the above, and I had been having issues before with random BCM issues. Also, I thought my multifunction switch or flasher was going out, because it would light the turn signal up but not flash. Cruse control would randomly cut off, esp if I hit accelerate button. All of this was related to the same problem.

My problem was one of my cigarette lighter sockets was grounding out. I thought that if this happened that it would blow the fuse, not so in my case. My truck has a backup camera installed before, and the dumbasses tapped into one of my front plugs. Removed ground, everything went back to normal.

On a side note, I think if you are looking for grounded connections I would check trailer sockets as well. I think they can create similar issues to what I was experiencing.