help with electrical system - F-Body Road Racing and Autocross Forums

Background: I went to pick my car up today after getting the T2R installed. The shop owner drove it maybe five to eight miles this a.m. to make sure the gears sounded okay. It started up and ran fine for him. I got there, paid him, grabbed the keys and walked to the car. Nothing. No interior lights and it wouldn't even turn over. (Car has the original battery from 1999. I was going to replace it this summer.)

So we attempted to charge the battery with a plug-in charger. The lights came on and everything worked for a few seconds, while the charger was attached. Then it started acting funny, drawing huge amounts of current for a second or two, then switching back to charging normally. So we stopped that (quickly) and got a new battery. We installed that and everything came on and the car started right up--it idled sluggishly at first, which it has never done before, but it was fine after a few seconds.

Everything appears to be fine, now, but the headlights. They won't turn on. The foglights and dash lights work fine. The owners manual says the headlights are "protected by a circuit breaker" but it doesn't say how to find the breaker. Does anyone know where it is?

Thanks in advance!

-John

Spooner View Member Profile	Apr 5 2005, 05:05 AM Post #1
Advanced Member Group: Advanced Members Posts: 438 Joined: 1-January 04 From: BOS Member No.: 85	Background: I went to pick my car up today after getting the T2R installed. The shop owner drove it maybe five to eight miles this a.m. to make sure the gears sounded okay. It started up and ran fine for him. I got there, paid him, grabbed the keys and walked to the car. Nothing. No interior lights and it wouldn't even turn over. (Car has the original battery from 1999. I was going to replace it this summer.) So we attempted to charge the battery with a plug-in charger. The lights came on and everything worked for a few seconds, while the charger was attached. Then it started acting funny, drawing huge amounts of current for a second or two, then switching back to charging normally. So we stopped that (quickly) and got a new battery. We installed that and everything came on and the car started right up--it idled sluggishly at first, which it has never done before, but it was fine after a few seconds. Everything appears to be fine, now, but the headlights. They won't turn on. The foglights and dash lights work fine. The owners manual says the headlights are "protected by a circuit breaker" but it doesn't say how to find the breaker. Does anyone know where it is? Thanks in advance! -John

pknowles View Member Profile	Apr 14 2005, 12:14 PM Post #2
Experienced Member Group: Advanced Members Posts: 1,427 Joined: 12-February 04 From: Huntingtown, MD Member No.: 193	I can't remember if its the BCM or the PCM that controls that stuff; I think it's the BCM. I'm not sure but there might be a BCM BAT fuse (I don't have a wiring diagram in front of me). If it's not recalling data, then it seems like a bad module or some blown fuse powering the module to store the values like milage in memory. If you can stay away from the Belkin (SP?) USB to Serial adapters and find one made by Keyspan. I've heard of countless problems with people using Belkin adapters. Have you done a complete PCM reset?