Try replacing the circuit breaker and see how it works.
Later Bob
Typical wiring diagram...negative ground.
if you have a test lamp try checking for power at the CB either side if you have power then move on to the amp meter make sure you have power both sides then on to the switch
before using a test lamp make sure it has a 24 volt globe in it and always test the tester on a known live supply and keep on checking it as you go encase use loose ground somewhere ie knock the alligator clip off
[attachment=26705]testlamp_zps703758c0.jpg[/attachment]
Paul![]()