Hello , My name is Josh and I live in Ca. I just put a uncut and hacked main harness on my bike and now rear running lights don't work. When I hit brake lever brake come on. My blinkers also work . The bulbs seem ok and I checked the connectors on both ends what should I do

 

Change bulbs anyway.

Then, if they still don't work, whip out your test light or multimeter and start tracing the power loss.

 

That's a fairly simple circuit to diagnose. Check for power at the first connector. If your headlight is working, the fuse and the fuse box should be working...

Sometimes the joints corrode where the circuit splits. Sometimes its deliberately hacked for track bikes, sometimes a pin inside a connector cones loose or corrodes...

But - bulb first!