Do you know where the red yellow and black wires actually go in the harness?
I assume from your description that you are using accessory power to power the switch and relay circuit so it is on key power. Maybe you should be using the yellow and black wire instead of the red and black?
What brand light bar is it? And I assume you are using the harness that came with it? What switch are you using in place of the included one?
Is the relay a simple four post with a plug in the harness? If so you can pull the relay and look for a diagram on it. It should show which terminals are which. You could check for 12V between pins 85-86 on the harness side when you have the switch turned on. What color wires go to those positions in the harness? Can you feel/hear the relay click when you flip the switch?
Last edited by BigTB; 02-05-2016 at 04:46 AM.