New member posting. You have a great reference that I have used many times before, but I registered today because I can't find this answered anywhere else.
It's a 2003 GT Turbo with the autostick transmission. Premium gas and a tight gas cap

Yesterday, as we were driving, the headlights and dash lights started flickering very slightly. Then the Trac On and ABS lights came on. We pulled over at a gas station and checked under the hood and took a peek at the fuse box, but didn't see any loose connections or blown fuses. Started it back up and everything was back to normal, so we continued on our way. Today the same thing happened, pulled over, took a look under the hood, started her back up and no more problem. About 30 miles later, the engine light came on. Fluids are fine, car drives fine, but intermittantly, the dash lights flicker and the engine light stays on constantly.
We drove it about 100 miles to get home. I checked the code and it says P0480. A quick search and some prior posts on this forum tel me that it may be the radiator fan relay, but the fan seems to be working fine since it was 103 today and we used the air conditioner the whole trip without so much as a jump on the temperature guage.
Anyone have any clues?