ammeter guage spiking

doug glenn · Dec 24, 2015

patient is 65 satellite big block. Has been upgraded with dual field alt. and electronic voltage regulator. Recently noticed ammeter spiking to full charge? for maybe 1 minute then dropping back to normal. When this happens tach reading drops to less than half correct rpm. At first it only happened occasionally, last sunday took a 100 mile round trip & it started spiking more often(a lot). Also lost a turn signal bulb. I'm leaning toward voltage regulator going bad. Had park lights on on the way back, then realized I had lost turn signal. What you guys think?

mopar 3 B · Dec 24, 2015

Maybe a field wire shorting?

miller · Dec 25, 2015

Might also get a hand on the backside of the gauge, and check for loose connections.

Nacho-RT74 · Dec 25, 2015

miller said:
Might also get a hand on the backside of the gauge, and check for loose connections.

:headbang:

or loosen conections anywhere ( bulkhead too )

doug glenn · Dec 27, 2015

think I found it. tach was grounded at starter relay. both had terrible grounds. will continue thru system checking for potential problems. thanks

mopar 3 B · Dec 27, 2015

That is almost funny just about an all metal car and tack ground is in the engine compartment.

dodge1972 · Dec 27, 2015

Double check the ground strap between the fire wall and the engine block. Make sure connections have no paint same is true for engine ground points.

ammeter guage spiking

doug glenn

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mopar 3 B

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miller

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Nacho-RT74

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doug glenn

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mopar 3 B

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dodge1972

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