enblethen wrote:
Yes, it looks to be hooked up correctly from what I can see.
Trace the wires from the large posts. One should go to the chassis battery and the other large post should go to the house battery. The small terminal should go to a hot in run position of the chassis wiring. This can be tested by checking it for power with ignition off, then when ignition is on. The metal case is the ground for the relay.
The wiring to the large posts look fairly small. I would be looking as you trace the wires for a fuse.
okay so, there is only power going to the starter battery input on the isolator. key on or off, the tester does not light up at all when I touch it to the coach battery terminal. dead isolator?