![]() Most people swap because they like the '85-'90 TA taillights better, of course. But all you really need to do is change one wire on the two outer-most three-wire sockets. It will even make the existing '86-'90 base 'bird taillights work more attractively too, all without doing anything more than simply changing a couple of bulb sockets. But if they'd seen this thread first, they could've saved themselves a lot of work.Īnd this wiring mod will make the '86-'90 base 'bird harness work with ANY year thirdgen TA taillights: '82-'84, '85-'90 and '91-'92. People try doing this, that and the other, tearing out and replacing harnesses, getting under the steering column, etc., or just trying to be clever and creative, only to end-up creating a lot of extra work for themselves. I wish I'd found it when I did this mod to a 'vert four years ago. There's not a better thread on the topic. But it can be made even simpler than this thread makes it. One of the most popular Firebird mods is to swap from base 'bird taillights to Trans Am taillights, and this 9 year old thread nails it perfectly and simply. I'm not sure if I made things clearer or worse for anyone, but if you have any questions, feel free to email me. Keeps the wire colors and function same as stock. The other lights will fit the Trans Am taillights without modification.įor the sockets I mentioned, I got them from a donor Trans Am harness, since they had the black, brown, yellow( or dark green ) wires already. This new socket now functioned as a running light and turn signal light, and I just plugged it into the outer most light for the Trans Am taillights. And then wired the brown (running light) wire from one of the disconnected running lights to it as well. Then with the new dual sockets (which are the same as what the Formula brake/running lights are), I wired the ground (black), and turn signal (yellow or dark green, depending on if it's the left side or the right side) from my old turn signal light into the new socket. With my old harness, I disconnected the two small running lights on each side, and the turn signal light on each side. 2 lights that are running, brake, and turn signal 2 small lights that were only running lights This site was particularly helpful in that it had clear pictures of the wiring for both the Firebird and Trans Am harnesses.Īt the bottom of the page, the author shows a wiring diagram that gives the same result as what I achieved. black, brown, and either yellow or dark green (for left and right turn signals). I also didn't need to swap harnesses, and all the wire colors still match up to the same as they did stock.įor the swap, other than the taillights themselves, I also grabed the dual filament sockets from another harness. It also allowed me to keep the stock flasher (apparently a heavy duty one is required other wise or the signals will blink quickly and dimly). The reason I did this was because it saved me from having to go under the dash to rewire stuff. The way I wired my lights up differs in that the outer most light on either side is used for the turn signal instead of the other two red lights. The other two red lights on either side are running lights, turn signals, and brake lights all in one. ![]() ![]() the outer most light on either side is just a running light. but hopefully it'll help someone out.įirst of all.I didn't wire mine up like those on an actual Trans Am. Mine probably won't end up being much better. Also, I might not have been using good search criteria, because I didn't find that many posts about wiring. I tried to search how to do it but found I was having trouble following people's instructions. I just did the taillight swap (89 Formula style to 85-90 Trans Am style) this past weekend and thought I would let people know what I did.
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