Looking for a working headlight control module for an '87 or '88. I know a few from the corvette and Firebird are interchangeable. Any luck?

Have you seen this?

https://www.ebay.com/itm/27...5:g:-~UAAOSwDndhUuZU

I have one.
PM me.
Kit

I got one off a corvette and unfortunately, it wasn't interchangeable. (you can have it if you want to pay for shipping) I ended up just replacing the relay in it and works like a charm. Have you cracked it open to see what's wrong?

The 91 -96 saturn coupe has the same module.

quote Originally posted by RandomTask: I got one off a corvette and unfortunately, it wasn't interchangeable. (you can have it if you want to pay for shipping) I ended up just replacing the relay in it and works like a charm. Have you cracked it open to see what's wrong?

The relay used in the Fiero headlight module is complex, board mounted and multi-pinned. Its contains something like four relay functions. While replacement relays are available replacing one is a huge tedious soldering job .

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

To Random Task

Not sure what's wrong with the relay but when I opened it it smelt burnt. I tested all the wires from the headlight switch to the relay and from the replay to the motors and everything is fine. Pretty sure I found the issue. Do you know the part number of the corvette relay you purchased?

Here's the GM Parts Store listing of all the fitments for the module, part # 16523917

https://www.gmpartsstore.co...trol-module-16523917


2004 Chevrolet Corvette Base, Z06 5.7L V8 - Gas
2003 Chevrolet Corvette 50th Anniversary Edition, 50th Anniversary Edition Pace Car, Base, Z06 5.7L V8 - Gas
2002 Chevrolet Corvette Base, Z06 5.7L V8 - Gas
2001 Chevrolet Corvette Base, Z06 5.7L V8 - Gas
2000 Chevrolet Corvette Base 5.7L V8 - Gas
1999 Chevrolet Corvette Base 5.7L V8 - Gas
1998 Chevrolet Corvette Base, Indianapolis 500 Pace Car 5.7L V8 - Gas
1997 Chevrolet Corvette Base 5.7L V8 - Gas
1996 Chevrolet Corvette Base, Collector's Edition, Grand Sport 5.7L V8 - Gas
1995 Chevrolet Corvette Base, Indianapolis 500 Pace Car, ZR-1 5.7L V8 - Gas
1994 Chevrolet Corvette Base, ZR-1 5.7L V8 - Gas
1994 Pontiac Sunbird GT, LE, SE 2.0L L4 - Gas, 3.1L V6 - Gas
1993 Chevrolet Corvette 40th Anniversary Edition, Base, ZR-1 5.7L V8 - Gas
1993 Pontiac Sunbird GT, LE Value Leader, SE 2.0L L4 - Gas, 3.1L V6 - Gas
1992 Chevrolet Corvette Base, ZR-1 5.7L V8 - Gas
1992 Pontiac Sunbird GT, LE Value Leader, SE 2.0L L4 - Gas, 3.1L V6 - Gas
1991 Chevrolet Corvette Base, ZR-1 5.7L V8 - Gas
1991 Pontiac Sunbird GT, LE, SE, Value Leader 2.0L L4 - Gas, 3.1L V6 - Gas
1990 Chevrolet Corvette Base, ZR-1 5.7L V8 - Gas
1990 Pontiac Sunbird GT, LE, SE 2.0L L4 - Gas
1989 Chevrolet Corvette Base 5.7L V8 - Gas
1989 Pontiac Firebird Base, Formula, Trans Am, Trans Am GTA, Trans Am GTA SE 2.8L V6 - Gas, 3.8L V6 - Gas, 5.0L V8 - Gas, 5.7L V8 - Gas
1989 Pontiac Sunbird GT, LE, SE 2.0L L4 - Gas
1988 Chevrolet Corvette 35th Anniversary Edition, Base 5.7L V8 - Gas
1988 Pontiac Fiero GT, Sport, Value Leader 2.5L L4 - Gas, 2.8L V6 - Gas
1988 Pontiac Firebird Base, Trans Am 2.8L V6 - Gas, 5.0L V8 - Gas, 5.7L V8 - Gas
1988 Pontiac Sunbird Base, GT, SE 2.0L L4 - Gas
1987 Chevrolet Corvette Base 5.7L V8 - Gas
1987 Pontiac Fiero GT, SE, Sport, Value Leader 2.5L L4 - Gas, 2.8L V6 - Gas
1987 Pontiac Firebird Base, Trans Am 2.8L V6 - Gas, 5.0L V8 - Gas, 5.7L V8 - Gas
1986 Chevrolet Corvette Base, Indianapolis 500 Pace Car 5.7L V8 - Gas
1985 Chevrolet Corvette Base 5.7L V8 - Gas
1984 Chevrolet Corvette Base 5.7L V8 - Gas

I have a couple of these, but not sure if they work. I'm guessing there's not an easy way to test them, except for plugging them in and turning on the headlights?

[This message has been edited by Fiero_Adam (edited 05-18-2022).]

quote Originally posted by Dennis LaGrua: The relay used in the Fiero headlight module is complex, board mounted and multi-pinned. Its contains something like four relay functions. While replacement relays are available replacing one is a huge tedious soldering job .

I did it in like 45 min; the main relay is actually easy to replace; just need a good soldering iron and some soldering wick and it came right out.

quote Originally posted by RandomTask: I did it in like 45 min; the main relay is actually easy to replace; just need a good soldering iron and some soldering wick and it came right out.

Great job. Last I looked there was something like 14 pins on that relay that all had to be un-soldered and resoldered. I guess with the right iron and a good wick the job can be done and you've proved it.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 05-24-2022).]