I am down to the tail lights, stop lights and blinker lights. I put a stake bed on my 2003 f150 it is almost done. But I can not get the rear lights to work right. I can get tail lights, brake lights and blinker lights. The problem is, When I have the tail lights on, and put the brakes on the lights go out. I have spent many hours trying to fix this problem but with no success. Can anyone give me any suggestions that may help me before I explode. thank you in advance. You guys have been a great help to me, thanks again.

 

The original lights have three wires going to them. The lights I am installing have only two wires. Could it be that one of the original three wires should be grounded.? Or maybe two of the three wires should be connected to only one of the wires on the new lights.? I very much appreciate any help that I can get. thank you

 

OK so 2 of your 3 original wires should have power, the other being ground. Try wiring the two with power together and see if that helps. I may be on the wrong path that way, but its a start. After that, yeah, check your grounds.