Alternator problems - mechanical
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Postmaster
Joined: Apr 2001
Posts: 3,628
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From: Baileyton, TN
Alternator problems - mechanical
The alternator in my '89 (302) F150 keeps failing. It is the third time in the 4 years I have had the beast. Has anyone got any idea why it should do this, what to check for, and where to get a replacement that is not likely to do it again???
My F150 is not the best of trucks, but it would be nice if I could use the thing.
Theo
My F150 is not the best of trucks, but it would be nice if I could use the thing.
Theo
Junior User
Joined: Apr 2003
Posts: 84
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From: Oklahoma City
Alternator problems - mechanical
Did you also change the wiring harness connection to the alternator.
I went through two in about a year and when I went back for the third one the parts store told me they wouldn't honor my warrenty again unless I changed my wiring harness connection.
Of course this time the replacement altenator actually came with one so I changed it and didn't have anymore problems.
I went through two in about a year and when I went back for the third one the parts store told me they wouldn't honor my warrenty again unless I changed my wiring harness connection.
Of course this time the replacement altenator actually came with one so I changed it and didn't have anymore problems.
Senior User
Joined: Mar 2002
Posts: 450
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From: Charter Oak, Iowa
Alternator problems - mechanical
Ditto on Stampede. If the harness connections are loose/corroded it will cause heating of the rectifier bridge and eventual diode failure. Buy a replacement that comes with a new harness plug and swap it in.
Randy
Randy
Lead Driver
Joined: Feb 2003
Posts: 8,140
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From: Oak Harbor, OH
Alternator problems - mechanical
MY dad and I nick-named that harness system and alternator the "Flame Thrower" we had 3 catch fire in the space of 8 months. Finally the last one fixed the problem. Buy a good HIGH quality alternator not a cheap auto zone POS, pay through the nose and get it at napa, car quest, or the dealership.
