Originally Posted by ekuhlman
To clarify... the two wires described in my diagram that refer to "To 12V lights (+) & (-)" are the two wires that initially connected directly to the wall switch. The one marked (+) is the one I cut and spliced the remote contro RED wire to. The WHITE wire I connected to the wall switch that the "(+)" wire initially connected to.
The ground wires I spliced to the "(-)" wire for ground.
Maybe I have to install this device near the actual lights rather than the wall switch...???
I think this is where some of your confusion comes from.
I think you 'assumed' they were + and - when in reality they are not.
Even though they may be different colors (usually black & white) the are in reality, both just the + side of the circuit.
The factory uses the same wire to feed the light switch as they do for all other wiring so they don't have to buy a different (both wires the same color) twin pair wire.
The wires at the switch are simply the + feed to the light. It comes in from the positive supply on one color and out to the light on the other color.
I would guess if you are mounting the controller near or at the switch, you likely do not have ground (-) anywhere near there. you'll need to run a wire from another location or find someplace to tie into chassis ground.