Mike your situation mirrors mine exactly. I replaced the ammeter that was not working for some unknowen reason, with a volt meter. The instructions were easy and it went in like a snap.
HOWEVER they didn't tell you what to do with the left over 2 wires from the hot post on the starter and the altenator. I finally discovered by my self that they must be connected together to properly charge the battery. They can be shortened considerably under the hood. getting away from these high amperage wires under your dash. Hope this helps a little bit.
