Question about 1999 Plymouth Grand Voyager
Ok..that is a strange one.. I am going to hazard a guess and suggest you look to the AC compressor.
When you run the defroster the ac compressor comes on..typically whenever the outside temp is above 40 degrees.. the ac compressor kicks in to dry out air inside.
Often when it rains.. the windows fog.. you turn on the defrost.. the ac compressor tries to come on.. and.. there ya go.. rather there your serpentine belt goes.
Several things could cause this.. worn belt.. failing belt tension-er... or failing ac compressor..
If the ac compressor is frozen meaing it will not turn..when the electric clutch on the front engages.. it would cause the pulley to stop turning.. and the belt would have a hard time staying on a non rotating part.
Or if the belt tension-er is bad..or the belt is worn.. when the additional load of the compressor kicks in.. it jumps off.
Finally it could be a combination of all three..
Best of luck..
Posted on Apr 13, 2011
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Posted on Jan 02, 2017
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