Reading 18 volts - Team Camaro Tech
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post #1 of 8 (permalink) Old Mar 23rd, 12, 10:30 AM Thread Starter
Josh
 
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Reading 18 volts

Not sure whats going on here, Ijust got the car and the alternator pulley assembly was making noise and it was reading 18 volts, so we changed it out. The noise is gone, but it is still reading 18. Where do I go from here?

Thanks
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post #2 of 8 (permalink) Old Mar 23rd, 12, 10:52 AM
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Re: Reading 18 volts

Don't know what system you have...but look into changing the regulator. It may be on the radiator support if it's a first gen, or could be internal in the alternator.

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post #3 of 8 (permalink) Old Mar 23rd, 12, 12:08 PM
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Re: Reading 18 volts

Or perhaps the regulator case isn't grounded. New paint perhaps?

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post #4 of 8 (permalink) Old Mar 23rd, 12, 01:03 PM
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Re: Reading 18 volts

It's a '96 Z.

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post #5 of 8 (permalink) Old Mar 23rd, 12, 03:58 PM
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Re: Reading 18 volts

Internal reg'd alternator, as suggested, check ground wire(s) to engine, even the ones for the ECM to engine.
Might have to unbolt them and wire brush all connections plus attachment point involved.
Check battery connections for the same condition.
Don't turn any accessories until its fixed for fear of blowing them out due to overvoltage.

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post #6 of 8 (permalink) Old Mar 23rd, 12, 06:00 PM Thread Starter
Josh
 
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Re: Reading 18 volts

Thanks for the advice. I just changed the alternator, so if it is an internal reg, that should have fixed that part. I will start on the main ground for the ecm. Thanks again.
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post #7 of 8 (permalink) Old Mar 26th, 12, 04:44 AM
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Re: Reading 18 volts

Took the voltage from the battery while running and it read 14.4volts. Could it be the gauge or something else?

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post #8 of 8 (permalink) Old Mar 26th, 12, 06:33 AM
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Re: Reading 18 volts

If battery measures 14.4 volts and alt BATT stud measures close to the same,
and anywhere else on the vehicle, nothing measures over this voltage, yep, I would wager the gauge/voltmeter.

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