While I was reworking my front wiring harness, I found a wire junction in the harness. This is were all of the front lights tie in together. (I think its the ground for them)
I was having a problem with my side marker lights. They worked, just not as bright as they should have. Anyhow, it turns out that were all these wires tie together into a common location was my problem.
You might try looking here. It is located in the wiring harness that goes around the drivers inner fender well, just before the battery. Should be behind the the plastic elbow for the air intake. You will have to remove the harness plastic tube covering and untape the harness to locate it.