Mechanics

ALTERNATOR REPLACEMENT

1990 Chrysler Imperial

Electrical problem
1990 Chrysler Imperial 6 cyl Front Wheel Drive Automatic 165349 miles

Need help removing the alternator from a 3.3L Imperial. With the support bracket, I can't find room to get to anything. There must be a simple way to get it out of there.
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Jwyoungjr
November 8, 2009.



Sorry for the delay in replying to your question. Wish I had seen it earlier. The alternator can be dropped out the bottom behind the cross member.

The most common problem is worn brushes. The assembly is less than ten bucks and can be replaced without removing the alternator from the engine. To verify they are the problem, use an ohm meter to measure between the two small terminals on the back. The little nuts might be rusty so use meter probes that are nice and sharp, and scratch the nuts a little to get a good connection. Also, little bits of carbon from the brushes often cause intermittent brush connections that can mimic worn brushes. This isn't an issue when the alternator is spinning but it can lead to a false diagnosis. If you find an open circuit between the two small terminals, which indicates worn brushes, tug on the serpentine belt a little to " irritate" them. If it still reads open circuit, the brushes are worn and the alternator will not produce any output.

Caradiodoc

Caradiodoc
Nov 28, 2009.