No power.. Ammeter questions.

There is an old thread about converting to a voltmeter. Otherwise if you are 'set' on an ammeter, finding a good used one or spending money to have it reworked is probably your choice. Brazing/ soldering the studs to the ammeter "guts" will prevent future heating These are a poor design.

This thread here

Ammeter to Voltmeter...who does it?