first off yes I know my car is a 1982 ok ..... But I put 1990 wiring throoughout the car so now it has 1990 firebird tail-lights ((( the kind with the amber turn signals ))) ......

OK so I found a set of 1984 tail-lights and a complete harness to go with them. Sooooooo how do I get the 1990 harness to work with the 1984 harness so I can have original style lights back in my car ?????

Or is is a hassle ????? If so they will be sold and I will just leave the 1990 lights in the car ..... I remember a thread on putting GTA tail lights in a formula but not sure if the wiring is the same as a 1984.

 

I think you can just unplug the 90 tail light harness and plug in the 84 harness. But I'm not 100% positive.

 

no because 90 harness has a seperate brake wire feed that 84 doesnt

 

What about using a Trans Am tail light harness it has the 3 light sockets like the 84 lights.

 

well I have a 84 harness but my car has a 1990 harness ok. heres the problem 84 has brown/green/yellow/black .... the 1990 pigtail has brown/green/yellow/blue/black

1990 firebird had seperate turn signals from the main tail-lights

so we have this

1984

brown- running park lights
green- turn signal
yellow- turn signal
black- ground

1990

blue- brake lights
yellow- turn signal
green- turn signal
brown- running lights
black- ground

I've tried the blue "90" wire to the trun signals like another member suggested and that didn't work right. Even tried a towing converter box which is supposed to have same wires as my 90 harness yet when hooked up make a 4 wire combination tail-light setup work and that failed.

 

Well, I gave up and took the 90 harness and and made it work with my 84 tail-lights by using the outside bulb on each tail-light and turning it into a turnsignal/running light. so they kinda work like the 92 trans am lights where the inside two lights are for brake/running lights and the outter is a turn signal.

When I have some more time I am going to look into that sequentail brake light thread and do them like that.

 

I was talking about using a taillight harness out of a 90 Trans Am.