crwalkerasla
Well-Known Member
- Messages
- 312
- Location
- Corinth, MS
Hey there folks,
I've got a real head scratcher here.
Symptom: When you first crank the truck, every warning light on the dash comes on, Speedo & Tach jump around, fan, windows, and lights don't work, and truck runs rough for about 30-seconds. After that the warning lights go off, engine plains out and purrs like a kitten... until 6 weeks ago. Then the headlights hi/lo and fog lights went out.
The old man at AutoZone who gets referred to for all things electrical, listened to the symptoms, and checked a manual, then told me that it all seems to electrical items controlled by the Body Control Module (BCM), and that I should check it to see if it had any evidence of getting wet. It had.
I tried cleaning all the contacts and re-seated it with dielectric grease, but that didn't correct the problem. Checked the headlight fuses and relays, they were fine. Replaced the BCM, and had it taken to GM for a reflash - All the same issues are still there. Just prior to all this beginning, it was in the shop getting a new (stouter) alternator, transfer case, and front differential. I have recently sunk a ton of money into this and I still can't drive it. Patients are wearing thin.
Any ideas what it could be?
I've got a real head scratcher here.
Symptom: When you first crank the truck, every warning light on the dash comes on, Speedo & Tach jump around, fan, windows, and lights don't work, and truck runs rough for about 30-seconds. After that the warning lights go off, engine plains out and purrs like a kitten... until 6 weeks ago. Then the headlights hi/lo and fog lights went out.
The old man at AutoZone who gets referred to for all things electrical, listened to the symptoms, and checked a manual, then told me that it all seems to electrical items controlled by the Body Control Module (BCM), and that I should check it to see if it had any evidence of getting wet. It had.
I tried cleaning all the contacts and re-seated it with dielectric grease, but that didn't correct the problem. Checked the headlight fuses and relays, they were fine. Replaced the BCM, and had it taken to GM for a reflash - All the same issues are still there. Just prior to all this beginning, it was in the shop getting a new (stouter) alternator, transfer case, and front differential. I have recently sunk a ton of money into this and I still can't drive it. Patients are wearing thin.
Any ideas what it could be?