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Over-voltage HELP

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Old Jul 5, 2009 | 09:36 PM
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Default Over-voltage HELP

Washed underhood today and I don't what happened but now my voltage is dangerous high 18v.

Any thoughts. It's an 02. Alternator was replaced this year.
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Old Jul 5, 2009 | 09:42 PM
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give it few hours to dry then start it again
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Old Jul 5, 2009 | 09:44 PM
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Originally Posted by Noxious
Washed underhood today and I don't what happened but now my voltage is dangerous high 18v.

Any thoughts. It's an 02. Alternator was replaced this year.
Is it consistently high or does it fluctuate? You may have damaged the alternator. Have you verified with a meter or are you relying on the instrument cluster?
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Old Jul 5, 2009 | 10:00 PM
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Originally Posted by flak_monkey
Is it consistently high or does it fluctuate? You may have damaged the alternator. Have you verified with a meter or are you relying on the instrument cluster?
Consistently high. Idle isn't terrible but as soon as it sees some revs it shoots up to right at 18.

Going on cluster. I can tell by the lights and gauge that it's not jumping.

I purposely tried not to spray it directly and I was using a garden hose at low pressure.

Originally Posted by Engine_HP
give it few hours to dry then start it again
Waited several already but I'm stuck at the office. I'm going to have to drive a company vehicle I guess.....
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Old Jul 5, 2009 | 11:08 PM
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Your alternator is gone. Mine did the same thing before it took a dump.
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Old Jul 6, 2009 | 07:23 AM
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Originally Posted by 94'BLKBRD
Your alternator is gone. Mine did the same thing before it took a dump.

Yeah I'm pretty sure the voltage regulator is messed up. I'm going to wait a while today to start the car and make sure it's dry but if it is that makes number 2. I kept my old one that wasn't this severe so I'm going to slap it back in and order a 20 dollar regulator and see if that clears it up.

If the thing charges it HAS to be the regulator pretty much. If the rectifier was bad it wouldn't charge and if the windings/brushes/assembly were bad it'd make noise or not charge.

Anybody ever do that?

Let it set overnight and started it and it's fine. I guess it was wet and needed to dry. I'm still going to fix the old one though.

Last edited by Noxious; Jul 6, 2009 at 10:20 AM.
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Old Jul 6, 2009 | 02:06 PM
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Looks like you've got it under control.
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