Volt Meter Reading Analysis Needed |
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Volt Meter Reading Analysis Needed |
Ansbacher |
Mar 9 2015, 06:54 PM
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#1
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Senior Member Group: Members Posts: 689 Joined: 4-July 14 From: Tampa Bay, Florida Member No.: 17,589 |
Simple question, I think. With engine running and no extra electrical loads turned on, my voltmeter reads a bit over 13 Volts. Turn on headlights and voltage drops to a bit above 12 Volts. Is that a normal drop or is something going on with the voltage regulator or alternator?
Ansbacher |
Spoke |
Mar 9 2015, 09:00 PM
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#2
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Jerry Group: Members Posts: 7,052 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
The voltage you measure is expected of the center console voltmeter. I checked the voltmeter in my car with my multimeter and it was less than 0.25V different than my multimeter.
The voltage drop you're seeing with the lights on is a simple IR (current x resistance) voltage drop of 40+ year old wiring and connectors. You might get rid of some of the voltage drop by cleaning all grounds and battery connections. |
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