There is a nice full electrical wiring diagram booklet out. I've got one, and it's available on Ebay. I've just rewired almost my entire Sprint. Just like your mentioning. Check the ground wire connections in the trunk. Check how the bulbs are seated, that can REALLY screw things up. I had cracked sockets in one and it was doing exactly what your talking about. Do you have good bulbs in the front turn lights in the front bumper? Are they working? Grounded? That's another bummer to watch out for. Had it, seen it.