I installed all new LED lights through out my truck. Side markers, front turn sigals, back up, third brake, tail, and license plate lights. All LED. to fix the hyper flash I have an electronic flasher that works. Everything works when I have the lights on. But when I have the headlight switch in auto and the fog light switch pulled out and I step on the brakes the fog light come on. The front signal lights come on with the head light switch on or off. I had the load resistors installed on all the corners. Did not help.

Any suggestions would help. Thanx

 

You need a diode, the leds are back feeding into your fogs through the circuit board.

Here is the diagram sent to me by V-leds. This apparently is pretty rare problem. Hope this helps.

 

I picked some up a Radio Shack for a couple bucks. I still haven't put the diode on mine as I am not confident with my soldering ability.

 

Thanks for the info. I will try that.