charging 15.5 volts - Team Camaro Tech
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post #1 of 4 (permalink) Old Jul 26th, 06, 09:12 PM Thread Starter
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charging 15.5 volts

I have replaced the alternator and voltage regulator and installed a new voltmeter. At idle, the voltermeter reads 13 volts. At 2,000 rpm, it reads 15.5 volts and stays there no matter what the rpm. Is this too much voltage?
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post #2 of 4 (permalink) Old Jul 26th, 06, 09:35 PM
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Re: charging 15.5 volts

wow! i would like to see 13.5-14.3 or so....14.5 maybe....but 15.5?

how accurate is your meter? some can be off quite a bit....

after you determine that your meters accurate then adj your volt reg(if its adjustable)
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post #3 of 4 (permalink) Old Jul 27th, 06, 03:51 AM
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Re: charging 15.5 volts

Use your DMM and place it across the voltmeter terminals to see if the gauge matches the meter. Sometimes a gauge made on a Friday afternoon or first thing Monday morning will be out in left field.

If the two do match, then the regulator might need adjusted. After 10 minutes of running, to charge the battery back up from starting the engine, turn on the lights, and heater motor. At 2000 rpm, voltage should not be below 13.8 volts. However, no accessories on, voltage should not exceed 14.8 volts.

Remember, the hotter temp the battery, the less voltage needed to recharge.

You might get a Wells VR715 reg and replace the mechanical reg. Problems will be over.

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post #4 of 4 (permalink) Old Jul 27th, 06, 06:10 AM
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Re: charging 15.5 volts

Check the voltage at the #3 terminal on the regulator, the red wire with the fusible link, it looks orange sometimes.

With the red meter lead in #3, check the reading with the black lead on the reg base, and again with the black lead on the alternator case.

There should be no difference between the 2 readings.

If there is, it's possible that either the regulator is not getting a good ground, or the entire rad support is not getting a good ground. Star washers under some of the mounting bolts is the fix.

I had this problem with my car. Too much new paint "ungrounded" the rad support. A couple of star washers under the bolts from the rad support to the inner fender fixed it right up.

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