A/C smelled like burning electronics then stopped working(not resistor or switch)

siava1018 · Jul 17, 2013

So like the title says it started to smell like burnt electronics/plastic then stopped working. I swapped the resistor with a one that i know works and I cleaned the switch contacts(the dielectric grease was black) and still nothing. Im going to check fuses tomorrow but i assume the blower motor is shot. Also over the winter the blower would cut out then come back on.

On another subject my volt gauge sits under 14v and if i turn on the ac,wipers,rear def,lights and fogs it will drop down real low and if i hit a puddle it will set off the check gauges light even with nothing on. belt, battery or alt?

kastein · Jul 17, 2013

I would bet on the relay for the motor, but could be wrong. What year???

If it is a 97 and later, the relay is behind the glovebox. Take the glovebox out (it flips down if you remove a few things) and it should be right there. Mine blew up in my 98, did exactly what you describe, smelled like burning electrical stuff and then stopped working.

siava1018 · Jul 17, 2013

Yes its a 2000

joe_peters · Jul 17, 2013

siava1018 said:
So like the title says it started to smell like burnt electronics/plastic then stopped working. I swapped the resistor with a one that i know works and I cleaned the switch contacts(the dielectric grease was black) and still nothing. Im going to check fuses tomorrow but i assume the blower motor is shot. Also over the winter the blower would cut out then come back on.

On another subject my volt gauge sits under 14v and if i turn on the ac,wipers,rear def,lights and fogs it will drop down real low and if i hit a puddle it will set off the check gauges light even with nothing on. belt, battery or alt?

Don't rely on the dash gauge. Put a voltmeter between the battery terminals and measure STATIC voltage--everything turned off--and you should see about 12.5 volts. Then, turn on the engine and recheck the voltage--should be 13.5 to 15.5 with all accessories off.

If the A/C-heater blower circuit is bad--not working--then dumping that load into the mix will skew your results.

siava1018 · Jul 17, 2013

ok so i checked the relay pins 87 and 87a look burnt but it functions fine. Where are the main wires going to the motor so i can make sure its not the motor?

siava1018 · Jul 17, 2013

I pulled the motor bench tested it and its shot

A/C smelled like burning electronics then stopped working(not resistor or switch)

siava1018

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kastein

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siava1018

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joe_peters

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siava1018

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siava1018

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