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> testing an alternator off the car
JFG
post Sep 5 2019, 01:45 PM
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My alternator is no longer charging so it's now been removed. The company refurbing it can't touch it for 2 weeks so i'm thinking maybe i can have a look at it first.

It's a Lucas 00194 unit.

When i took it off and removed the air cowl off the back i noticed there was a smudge on the positive plate and paint missing on the cover in the coresponding spot. Could the plate have shorted the alternator?

Is there a way that i can test the alternator with the cover off now that it's off the car?

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914Sixer
post Sep 5 2019, 05:43 PM
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I always take them to the local parts store and let them bench test.
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bbrock
post Sep 5 2019, 10:34 PM
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QUOTE(914Sixer @ Sep 5 2019, 05:43 PM) *

I always take them to the local parts store and let them bench test.


I tried that recently with one I just rebuilt. I called to make sure they could bench test an alternator with external voltage regulator. They said they could. Drove a half hour into town and they put it on the machine. Nope! Machine said it could only be tested in the car. Drove another half hour home with untested alternator. It did pass all the diagnostic tests described in the factory manual that can be done with a multimeter though.
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