Just information for anyone who needs it. This year uses three different relays to operate the headlights: (One) Isolation Relay #10022620 (I found this in between the radiator and battery) battery 10022620.jpg (Two) Headlight Actuator Relays #10031246 (I found one on the LH fender near headlight and the other on the RH fender near headlight and battery.) driver 56-1793.jpg passenger 56-1793.jpg All of these relays have “HR” on the top and 10031246 cannot replace 10022620. GM dealers show that 10022620 relays are discontinued and 10031018 relays are a replacement for all the relays. As far as I can tell, 10031018 is a replacement for 10031246 Actuator Relay, but cannot be used for the 10022620 isolation relay. I do not believe there is a replacement made for 10022620 and I notified GM about this possibly being wrong in their parts catalog. GM sells 10031018 for $50 and I did not want to spend the money to find out. Car Quest sells a replacement for 10031246 for around $22. The part number is 56-1793. The only replacement 10022620 I could find is on other Firebirds and Fieros around the same years. Just look for the 10022620. How to test circuits: Go to You Tube, search “fiero gen 1 headlight motor circuit test 1of2”. Buddy Craig has two great videos on how to do this using a testlight and manually crossing wires to figure out what is and is not working. How to rebuild the headlight motors: Go to You Tube, search “Rebuild of Fiero Gen 1 headlight motor”. There are seven videos by Buddy Craig, who does a great job on how to rebuild the motors. Firebird Headlight Rebuild Parts: Check out www.rodneydickman.com/retail.html. Rodney specializes in Fieros, but also does the Firebirds. Most motors seem to have just the one plastic gear that strip, but mine had two plastic gears. The Intermediate gear was plastic in my headlight motor and the one that was broken. Rodney hooked me up with a metal one and provides complete instructions on how to perform the rebuild. Here’s the numbers off my motors in case it is helpful: Passenger headlight motor (not going up, but will go down. Has plastic intermediate gear): # 5048?01 Delco Products 224 5 17 11 Driver Headlight motor (works): #5045724 Delco Products 170 5 17 11 Good Luck…

Pictures of headlight motor

motor1.jpg

motor2.jpg

yeah i went through the same crap going back and forth with my local GM dealer to find out the same info on the part numbers. Nobody makes this relay aftermarket at all, looked everywhere. The problem is the actuator relays are used for a ton of other applications that's why they still make them. The isolation relay configuration as no use for anything else so they stopped making them. Sucks, had to call a scrapyard. Really thinking about buying up all the used isolation relays i can find, then i can charge whatever i want for them.

I have had pretty good luck finding them in Fieros. Picked up a couple for the future...