I only have brake lights since my car came back from paint. I had put Daves headlight harness on earlier last year. I had no problems. After I took off the front bumper, and valance, The head lights stopped working, this was expected do to lack of ground. I still had other lights at this point. I replaced all of the side marker lights after recieving the car back. I have finally had some good weather, everything is in place. Still no lights other than Brake lights. The fuse for the lights is good, the fuse in daves headlight harness is good.

ANY THOUGHTS?

Since it worked before it's likely just a connector problem. I'd start by pulling the headlight fuse in the fuse box and bridging the gap with a multimeter set to amps (use the 10A or 20A setting to be safe). When you switch on the lights you should see a small amount of current flow (less than 1A as I recall - just enough to actuate the relay). If you do see current then the problem is between the relay and the headlights or with the power source if you ran a new wire directly to the battery when installing the upgrade. If you don't see current then the relay is not able to operate and the problem is likely in the combination switch itself but certainly somewhere between the fuse box and the relay. Doing the above will at a minimum narrow the problem down but you may well discover the problem just by examining everything again as part of the diagnostic process.