i have seen this post a long time ago, but cant find any info on it. I have the regular tail lights and am putting in T/A lights. isnt there an easy way to wire them up and have all three flash at the same time? all i remember is something about a brake light wire under the steering colum and hooking it to the wires in the back, but dont remember. thanks for the help. I hate wiring. jason

 

My ex-bf did mine and i watched him. From what I remember he need all the plugs from the tran-ams lights for wiring. A little trouble getting one of them to fit inside the hole. That is all i remember but there is a link for more info.

https://www.thirdgen.org/techbb2/sho...hreadid=109403

 

what do you have to do to get all three lights to flash instead of two? i remember something about a blue wire doesnt do anything except the 3rd brake light after a certian year or something. its been a long time since i read anything about it.

 

ttt

 

this is what I had to do, the outside lights on both sides are not designed to blink, they are running lights therefore they do not have the third wire going to them for the flasher element. go to the local pepboys and buy two bulb holders that are for the two-way bulbs and swap them into the lights, the wire currently going to the assembly should go to the lower element in the bulb then take a piece of wire and jumper from one of the other blinker bulbs to the new lamp holder. all this can be done from the rear of the car, you should not have to do anything under the dash.

my car already had T-A lights but I changed my two bulb flashers to three bulb flashers when I installed the "sequential turn signals" so they would look better. obviously I had more wireing to change but it shouldn't apply to you.

I know it sound a little confusing but the idea is to make all three lamp sockets look the same, you will also have to get a couple of two element bulbs for the new sockets.

if you have any questions you can E-mail me at "lilnorm1@***.net"

 

should i use my existing wiring harness? or put the t/a harness in, is there any difference? thanks again for the help. i appreciate it.

 

I would think that it would be easier to install the T-A harness but you will still have to do the modifications I listed above, the factory T-A does not have three lights that flash. the outside light on each side is only a marker light and does not flash.

 

this might seem like a stupid question, but whats the difference between the two?

 

the only stupid questions are the ones never asked !!, I am not sure about the differance between the two because I am not familiar with the lights your car originally had, If they also had a similar setup to the T-A lights then you may be able to reuse the original harness and lamp soccets. you will have to visually compare the two and figure out whats the best way to go.

 

the car had base model, formula style lights in it. oh i hate wiring.

 

ok, i got the starter hooked up tonight after "modifying" the control arm bracket to accept the long tubes. I thought i was going to start on the tail light wiring tonight..i thought. i havent wired the t/a wiring harness in yet. i thought about using the exsiting one but theres no way. i printed out a post about how to wire t/a lights in in about a year ago and still have it. it is the following.
"connect the white wire on the edge of the turn signal connector(postion P, which does not go anywhere at the present)on the steering column to the light blue wire coming from the brake light switch. That makes the yellow & dark green rear turn signal circuts now dual function(brake/turn) At the rear of the car, connect the 3 brake bright filaments on the left side to the yellow wire, and connect the 3 bright filaments on the right side to the dark green wire. Also connect all 6 dim filaments to the brown wire- running lights. The light blue wire will now be a no connect at the rear of the car."
the following post the guy exclaims it works, it makes sense, but will probably make more sense when i have the harness in front of me. oh i hate wiring.

 

note that there are three distinct revisions of thirdgen transam taillights.

82'-84' signified by big grooves in the lights (ones cfirebird86 used for the swap)
85'-90' smooth with a black checkerboard pattern over the lights
91'-92' similar to 85'-90' but has pontiac written on it in large block letters

 

well hell. i tried wiring my lights up tonight. i wired the t/a harness in, put the yellow to yellow, light green to light green, and dark green to dark green, brown to brown, and ground to ground. i tried what i had quoted on the previous post, wiring the P slot on the connector at the bottom of the sterring column to the light blue wire on the brake switch. when i turn the turn signal on, the lights flash extremly fast and dim, and i have no brake lights. things worked great before i did this(with the factory harness)now things are messed up. any ideas? after i get this part done, the rest of the car will be easy..........i hope thanks again.

 

factory firebird formula flasher did not work well with the T/A taillights. used an aftermarket electronic one and it solved the flashrate problem.

 

anyone else know anything about the P connector? and jumping it to the brake wire? thanks again.

 

well, i was reading over and over the old post, talking to Fbird88 about it, after about the 4th time reading it, and us kicking ideas back and forth(hey neither one of us are wiring guru's by any means). My problem was hooking the wire up under the dash, and which side of the wire. Then it hit me. This is the best way I can describe it, and what I have read.
If you are going from regular style tail lights, also formula lights, mine was a 89, your year may be different. The stock lights, there is a designated turn light, thats all it does, there are the brake lights, and a few running lights, that are the small bulbs. I know you can use this harness, and for someone who knows nothing about wiring, sounds confusing, and if I sat down long enough I probably could figure it out......maybe . The blue wire runs the brake lights, the yellow wire runs the left turn signal, the dark green runs the right turn signal, the brown runs the running lights, and I dont know what the green one does, might do to the license plate or something, and there is a ground. With all these wires going different places doing different things than the t/a lights, IMO its easier to wire in the T/A harness. On the T/A harness, all the left turn lights have yellow wires going to them, and the right turn lights have dark green wires going to them, (the far outer lights are running lights only)all the lights have a brown wire going to them for the running lights. hook the yellow wire from the t/a harness to the yellow wire from the car, do the same with the brown/dark green/light green and ground wire. now, with this wired this way, the yellow runs the left, the dark green runs the right, and the brown wire is for the running lights. now if you remember from earlier, the existing wiring in the car doesnt control the lights this way. go under the dash to the large turn signal connector, on the far side, which is labeled P(you might have to take the plug in off the column to see the letters, but it is the white wire on the far right. unhook or cut the wire coming down from the steering column, it doesnt go anywhere, now, on the brake light switch, there is a red wire in the middle, a blue wire and a blue/black wire. if you also remember from earlier, the blue wire in the back, that controlled the brake lights? its not hooked up anymore and serves no purpose. the red wire in the middle has power to it all the time, when you push the brake down, it closes the circut, and sends power to the back for the brake lights to come on. cut the blue wire, and from the wire thats conncted to the switch, that has the power, hook it to the white wire coming from the column. This makes the yellow/green wire brake/turn lights. thats all there is to it. i wish i would have figured this out sooner. also, use a heavy duty flasher, with all the lights flashing, the stock one wont cut it. On mine, i made it were all three lights are brake/turn so all of them flash and/or light up. sorry this was long, after i get this whole thing done, I am gonna make a tech article if theres not already one out there. see ya