Still having trouble with the "P's" Cobalt.
A week ago, Monday, my Dad and I tore out the majority of the Interior of the car. We had pretty much everything removed but the Dash so we could trace the wires going back to the Tail Lights. We didn't find one freakin' wire that looked frayed, split, burnt, or corroded. We pulled all the bulbs, one at a time, and tested with a Meter at the Fuse Block under the hood (at the Parking Lamp Fuse Plug In) to see if we were still reading a "Short Circuit" each time we removed a new bulb from the circuit. No change, ever. We even started removing other bulbs that had nothing to do with the wiring of the Parking/Tail Lights and still came up with nothing.
Fed up, we put the car back together and tried a new 15A Fuse. Sure enough, everything worked again. Dad drove the car home that evening with no trouble, left for work the next morning and they were fine, but once he got a couple miles down the road, the damn fuse popped.
I did end up purchasing a Haynes Manual for the car. My Dad (who is an electrician) is currently studying the wiring diagrams in hope we can find a suitable place to begin our search again.
I'll be sure to keep this thread updated with our progress. Good or bad.
If anyone has ANY information they believe might help us, please, Please, PLEASE Post Up!