Alternator problem

DAVID HUDSON2

MEMBER
1994 LINCOLN MARK VIII
4.6L
V8
2WD
AUTOMATIC
85,679 MILES

I replaced the battery and the alternator last month. I will be going on my third alternator. The first one was bad from the store and the one I have on the car now I had them test it before I left the store. Most recently I went to visit a friend that lives 2 hours away from me. The car ran fine no problems but once I got there, I turned the car off. Maybe 45 minutes later went to turn the car on the car was dead. Once I got back home I charged the battery and found out the alternator was not working again.

What would cause the alternator to stop working within a month?

Where are to motor to body grounding straps?

What else should I be looking for?

Any help would be great. Thank you

1 Reply

BMDOUBLE

MECHANIC
1,139 POSTS

Are these alternators Ford Motorcraft brand? If not, I've seen some of my customers replace up to seven aftermarket alternators before they got a good one. just my experience with them. I'm assuming that the last alternator was also tested while on the vehicle? I would start with the basics by verifying that the there is no excess voltage drop in the power wire to the alternator from the battery. Here is a description of alternator tests that can help: https://www.2carpros.com/articles/how-to-check-a-car-alternator

Alternator problem

1 Reply

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