Originally Posted by somewhereinusa
Test them with a digital multimeter. Meter black to ground, red to each wire while switching with the switch. It will tell you which is +. Also check different combinations of wire to wire.
Or just look at a wiring diagram.
I was going to test them but I didnít bring the ignition key. Just hoping someone has repurposed one of these. I want to repurpose the switch for my water pump and wire it in to the solar.