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Question

I suspect an electrical problem with the computer module. When driving the instrument panel gauges stop, most warning lights come on, and the speedometer is reading about half the actual speed. I left the engine running and disconnected the negative battery cable. The fan, radio and inside lights stayed working so I assume the alternator is OK. When I turn the engine off, disconnect the positive battery cable and reconnect then everything is OK again. After about 2 days the same thing happens again. I suspect the computer module.

Submitted: 276 days and 12 hours ago.
Category: Chevy
Value: $15
Status: AWAITING CUSTOMER ACTION
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Posted by Tracer 276 days and 12 hours ago.

Info Request

Not showing on my end. What make, model, year engine of the car?

276 days and 12 hours ago.

Reply

1999 GMC Sonoma, 4 cyl

Accepted Answer

here are pix. hope it helps. Thanks

 

 

Notes
Instrument Panel Details, RH
View Full Image
Notes
Body Control Module Details
View Full Image

 

Picture
Expert: Tracer
Pos. Feedback: 99.2 %
Accepts: 
Answered: 2/18/2009

ASE Certified Technician

ASE Master, 32 years, All makes models foreign/dom trucks and cars

276 days and 11 hours ago.

Reply

Thanks for the drawings. Everything in the drawings is located in the engine compartment on the firewall correct?

Posted by Tracer 276 days and 11 hours ago.

Answer

No, the modue is located behind glovebox mounted to the heater case

276 days and 11 hours ago.

Reply

Access is fron inside the car after removing the dashboard panel?

Posted by Tracer 276 days and 11 hours ago.

Answer

No, you should be able to get to it by maybe taking clove box out or working from under dash passenger side

276 days and 9 hours ago.

Reply

Based on the instrument panel drawing does one of the BCM connectors go to part C203?

Posted by Tracer 274 days and 7 hours ago.

Answer

I am unsure. Let me review diagrams. I will be away so back to you tomorrow.

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