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Most likely alternator problem. Cosmo replacement?

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Old 05-25-05, 11:17 PM
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Most likely alternator problem. Cosmo replacement?

Hey guys.

So I had some issues with the car today. In traffic all of a sudden the I lost radio and CD player and the car was in limp mode. Break-up under boost, 4wABS and Charge battery light on. Later at a stop light, EXTREME break up at take-off and after about 10 seconds it started driving again.

Silly me decided to pull off and shut her down. Wouldn't start again. Just clicking. Got a jump and made it home. Shut her down and wouldn't start again. The battery holds charge until I drive the car so I suspect the Alternator.

1. Am I correct in this assumption?

2. My buddy has a spare Cosmo 20b alternator. Can I use it on my car?

As always, thanks for the info guys!
Old 05-26-05, 02:15 AM
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take it to autozone and have em test alt?
Old 05-26-05, 07:16 PM
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Thats a start. Looking for info on if I can use the Cosmo Alt now. *bump*
Old 05-26-05, 08:03 PM
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if you have a digital multimeter you can test the output of the alternator.
Old 05-26-05, 08:36 PM
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Well I've never held them side by side, but they look identical from what I remember.. I'd say the the odds are good that there the same alternator.
Old 05-26-05, 08:42 PM
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Could be the alternator or battery.

Test the alternator with a volt meter (when running) and see if you can get about 14 volts. If so, test/replace battery. If not, replace alternator.

Old 05-26-05, 10:59 PM
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I can't comment on the Cosmo alternator (I would assume it's the same), but it sounds like you have an alternator problem, not a battery problem. I had the same thing happen to me, I replaced the battery but it didn't help. I got the alternator rebuilt; now it works like a charm.
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