What harnesses are you using? The Trucklite ones have crappy connectors and have been giving me a lot of problems. JW Speaker also claims the trucklite harnesses are not compatible with their headlights, I think it's just a warranty technicality though. You seem to be having a more serious problem then the headlights. Have you tried putting the stock headlights in to see if your problems persist? Would be the quickest easiest way to start narrowing down your problem. If your fog lights and turn signals are some how having issues also I don't see the JW Speaker lights being the cause but also the victim of another issue.