DEAD 1972 plymouth valiant

thomas cox said

I already had a voltmeter guage on the dash replaping the old guages. its an ammeter. Could that guage be burned up?

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That's why you need to make some checks and yes

Also we need to clear up here. Do you still have the original ammeter or was it replaced by an aftermarket ammeter or did you remove it and replace it with a voltmeter?

Also, BE CAREFUL. Disconnect the battery ground. If you still have an ammeter, those are high current connections and you can burn stuff down. If you replaced the ammeter, the original big red and big black must be bolted together (and taped) which had originally connected to the ammeter