Question about 1995 Buick Regal

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2000 dodge grand carivan, 3.3L, battery died, had it jumped with a jump box (connected correctly), started van. now my speedometer is pegged at 120mph, gas and temp gauge not working and either is my heater, only blows cold air. can turn on and off but no heat and none of the rear window buttons works for defost or wipers. cruise control, horn and air bag stopped working a while ago. does anyone know what could be wrong???? checked all fuses, they are fine and replaced bcm and that did not change anything

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The body control module has failed.

Posted on Nov 22, 2016


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6ya staff

  • 2 Answers


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Posted on Jan 02, 2017


Azrael SRL

  • 11800 Answers

SOURCE: 2000 buick lesabre no heat.

The heat is generated by a heater/small radiator in the dash. That small radiator uses hot coolant from the engine. The temperature is adjusted by varying the amount of hot water flowing thru it with a valve. That valve is commanded by a lever to which a cable coming from the temperature button is fixed - this mechanism no longer works causing the valve to remain shut so you end up with no heat.
You must access the back of the rear console to inspect and replace the failed part: the button, the cable, the lever or the valve itself. Of course you must do that with the engine cold.
The entire procedure is explained in detail - with pictures and diagrams - in this repair manual

Posted on Oct 17, 2010


Robert Wooley

  • 177 Answers

SOURCE: odometer, tachometer, speedometer, and gas gauge suddenly stopped working.

Sounds like the body control module has gone bad. It has a relay that caries considerable current to all of these accesories and wears out.
It can also be a solder joint on the circuit board where this relay mounts.
Hope this helps, Robert

Posted on May 16, 2012

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