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5,653 Posts

Most people have gotten away from the AMP gauges and now use Volt meters. All the major automobile makers too.
I suggest you do so too...............

BUT you asked so...........

The AMP gauge should have 3 posts on it .

G) is for a ground
I) goes to hot on the starter solenoid ....use at least a 10 gauge wire
S ) goes to the key switch or the alternator

There may be another post or place for the light in the goes to the light switch

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