Alternator fails when the fan is on high?

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Alternator fails when the fan is on high?

Postby ms2000 » May 13th, 2016, 9:55 pm

I revised my original post - btw, there is no participation in this forum?

Batt new - Alternator was worked on - no more dash warning lights.

However, alternator fails test when the fan is turned at the high setting (it is fine at low setting)
Any of u had similar issues - does the fan speed controller/slider needs replacing? How easy is to get in there and to change?

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Re: Alternator fails when the fan is on high?

Postby Bag » August 27th, 2016, 1:25 pm

I had a high output alternator installed years ago and seems fine under normal driving, but at idle, the battery light comes on. Best I can tell, when they serviced the alternator, they didn't use the proper voltage regulator. Suspect that may be your issue too. I took to dealer and they confirmed alternator was issue.. despite being brand new (aftermarket).

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