94 Pontiac Transport

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BENNETT3
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  • 2 POSTS
Over the past 6 months, my wife's 94 Transport has developed a series of what might be called "accessory" problems. The first involved the rear window wiper (sometimes worked, sometimes didn't); next was the passenger side power window (goes down but not up; I replaced the switch, but no help); then, the cruise control died; the heater/ac now has various problems [all heater buttons (Mix, Bi-level, etc.) activate the defroster only, dashboard blowers don't work, etc.]; the latest and most disturbing is this - starting with the abs sensor light, [u:a7cdc62dcd]sometimes[/u:a7cdc62dcd] all of the sensor lights in the dashboard stay on after the engine is running. Throughout all of this, the car runs fine; i.e., engine, transmission, brakes, cooling system, etc. On occasion, the motor won't turn over, but then five minutes later, it starts. It's all so wierd, it makes me think of when a computer's cpu overheats or somehow starts to fail and strange things pop up on the monitor. Is there a common control module for this car's electrical accessories the failure of which could account for the type of problems I'm describing? It's just too coincidental to think that this many accessories would start to go bad due to short circuits, corroded contacts, etc. I would appreciate any info anyone could give me (I've read all the questions/answers in the database for this vehicle re computer fault codes, etc.).
Jan 12, 2006 at 12:46 AM
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2CARPRO JACK
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BCM or Body Control Module
Jan 12, 2006 at 9:53 AM
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BENNETT3
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  • 2 POSTS
Thanks. Does anyone know where this BCM is located in this vehicle (94 Transport)? Is it the unit next to the circuit breaker/relay panel under the passenger side dash?
Jan 24, 2006 at 12:45 AM

Suggested Repair

Have the Body Control Module (BCM) inspected, as it was identified as the common module that could explain the multiple accessory electrical problems.

Conversation Summary

The owner of a 1994 Pontiac Transport reported several accessory electrical issues over six months, including an intermittent rear wiper, a passenger window that goes down but not up, failed cruise control, heater and A/C mode problems, dashboard warning lights that sometimes stay on, and occasional no-crank starts. The engine, transmission, brakes, and cooling system otherwise operated normally. The owner asked whether one common control module could explain the failures. The expert identified the Body Control Module (BCM). The owner then asked whether it is the unit beside the circuit breaker and relay panel under the passenger-side dash, but that location was not confirmed.

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