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Old 02-28-2011, 02:07 PM
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Chrysler Alternator not charging, what to check?

ok, 1975 plymouth fury, stock style alternator, has external regulator.

My problem, battery drains so its apperent that im getting no charge. What could I check to eliminate the external regulator and other items?

Any easy checks like the paper clip thing on a GM alternator?

any help is good, thanks!

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Old 02-28-2011, 03:12 PM
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A wiring diagram showing the dual field alternator is below. With it, and the info from any of several sites (google "mopar alternator output" or similar key words) you'll be able to see if the problem is w/the alternator or regulator.

But I'd be checking the battery voltage w/the engine off and again w/the engine running at a fast idle to be sure the alternator isn't putting out and it's not a bad battery causing your problems. Also be sure to check ALL the terminals for being loose or having broken wires, and for solid grounds throughout.

Your alternator is east to work on- it has bolted on diodes instead of soldered on like the pre '72 alternators. I used to get repair kits for them cheap, might still be available.

I had a '74 Satellite that had worn brushes and the slip rings were almost gone. I'd lose output from the alternator every once in awhile. To revive it, I'd spray carb cleaner at the brushes and slip rings and it would run alright for awhile. Went on like that until I finally broke down and went to the 'yard for another one.

If you try this, be sure to use non flammable carb cleaner, or do it w/the engine off.

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Old 05-15-2013, 12:33 AM
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Try checking here

I got a rebuilt alternator for my LeBaron from my autopartsnetwork that I was fixing up (it was a junkyard project). It was quick and cheap.

Chrysler Alternator - Beck Arnley, Bosch, Denso at Auto Parts Network

I find rebuilt ones seem to be more reliable than new ones, and it is hard to find a new alternator for these older cars anyway
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