The ammeter on mine was the same…dead! …the PO basically twisted the two wires together ..and not stock color codes. Fortunately I did have another 30A gauge from an old dash cluster and replaced it. With the angle of the connection terminals on the gauge , when removing the cluster it can easily arc against the dash frame so it is a great idea to disconnect the battery. On the other hand, unless you removed the gauge and jammed up something on the re-install, you could have simply fried the gauge .
the ammeter wiring is easily thought of as a single cable that was cut into two pieces with the ammeter spliced in. I have
@Coolerman fuse able link and he does a great job….additionally the gauge is fully insulated from the cluster plate so when you get in there, watch out for those little insulators on each terminal. They have a molded portion that fits into the plate so it won’t move and cause a short.
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