Robert, may I ask what you found, if anything yet? I spent a good part of the day on my 97' removing a bunch of wiring, antenna, cell phone mount, etc. from the previous owner. When I pulled up the carpet to remove the wiring on the driver side I did find the mat under the carpet on the drivers side very wet. Reading the above it sounds like the clearance lights are a big culprit. I do not have the clearance lights on the cab..... any other suggestions, ideas?
Jason