Gauge cluster/ Amp-voltmeter problem

Are you sure you don't mean the volt gauge? lol...anyways, the volt and coolant gauges "go together" so if you get another cluster, you can take out the volt/coolant "unit" and swap it.

The ampmeter can be replaced separately, as can all of the gages in a Mustang. It should mount with two screws through the gage plastic cluster mount and printed circuit.

Carefully inspect the printed circuit and the gage.

All of mine supposedly work, but I have never seen them move, and I have had the 79 Capri for 25 years now.

Note that there are diffenences in how the engine bay and dash harness are connected to the dash. Try to stay with matching dash harness and gage circuit boards. I mixed an 80 and an 82, and smoked the tach with the ammeter circuit.

yeah that's true...but if you take replace the gauge(s) that way, then you have to pop off the needles too and you have to mark where they were and put them back the same place.

I have not taken an 87 and up cluster apart, but the earlier ones are easy. Take the cluster out. The clear plastic cover can be unbolted. The the gages unbolt from the back, and the gage unit can be pulled out the front, or face. The needles come with the gages. I swapped tachs 3 times two weeks ago in my 79.