C2 amp gauge problem
Le Mans Master
Joined: Nov 2015
Posts: 7,463
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From: Really Central IL Illinois
A variation in charging DC voltage would show a fluctuation in the gauge. I would check the alternator to verify the output is steady DC from the rectifier circuits.
The other item which might allow fluctuation is the voltage regulator. A mechanical voltage regulator may be cycling, if it is, you should hear the points open and close.
Both can be check with your multimeter. Look at your GM Chassis Service Manual (Section 3 I believe) for guidance on testing them.
The other item which might allow fluctuation is the voltage regulator. A mechanical voltage regulator may be cycling, if it is, you should hear the points open and close.
Both can be check with your multimeter. Look at your GM Chassis Service Manual (Section 3 I believe) for guidance on testing them.
Le Mans Master
Joined: Feb 2012
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From: Western Massachusetts
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The C2 ammeter is connected to the electrical system with two small gauge wires between a lug on the horn relay and the starter. Positioned thusly it becomes very sensitive to system load. Press the brake pedal and illuminate the brake lights? The needle will jump, the horn and every other temporary load will do the same thing.
My bet is nothing at all is wrong. Put your DVM across the battery as above and prove it.
Dan
