91 92 tail's to 85 ta
12-28-2007, 06:34 PM
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Re: 91 92 tail's to 85 ta
no, they are different the 85 flashes 2 bulbs for the turn signal the 91 92 flash 1 amber not sure how to make it flash 1 instead of 2
12-28-2007, 08:34 PM
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Re: 91 92 tail's to 85 ta
They are not all the same. Some only use 3 bulbs, 1 1156, 2 1157s. Some use 4 bulbs, PLUS 3 smaller bulbs (145s i think).
To do my STS tail lights, I had to swap out the 2 outer most sockets to 1157 sockets. Not a big deal. Autozone/Pep Boys etc., carries brand new sockets.
To do my STS tail lights, I had to swap out the 2 outer most sockets to 1157 sockets. Not a big deal. Autozone/Pep Boys etc., carries brand new sockets.
Last edited by Stephen; 12-29-2007 at 05:22 PM.
12-29-2007, 03:13 PM
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Re: 91 92 tail's to 85 ta
i just put them on my 85 ta the way they are and the ambers dont flash
12-29-2007, 05:13 PM
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Re: 91 92 tail's to 85 ta
duh!!!what is the point of putting them on and not haveing them light up the way they are supposed to
what i want to lnow is how to modify the harness if you don't know don't reply
Last edited by intruder; 12-29-2007 at 05:18 PM.
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12-29-2007, 05:31 PM
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Re: 91 92 tail's to 85 ta
I don't know the wire specifics, but I know this...
The early wiring has no plug between the dash & the tail lights themselves,
Whereas, the 89 GTA I stripped, had a plug under under the rear seat, making it MUCH easier to unplug the harness. Dunno id the wires are the same at that point, and you could simply splice black to black, red to red, etc.
I know the early non-GTA lights & later lights have more sockets, but I dunno where the wires split off.
The early wiring has no plug between the dash & the tail lights themselves,
Whereas, the 89 GTA I stripped, had a plug under under the rear seat, making it MUCH easier to unplug the harness. Dunno id the wires are the same at that point, and you could simply splice black to black, red to red, etc.
I know the early non-GTA lights & later lights have more sockets, but I dunno where the wires split off.
12-29-2007, 06:03 PM
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Re: 91 92 tail's to 85 ta
Gentleman, here are two pics embellishing the newer harness. The connection to the main harness is behind the rear glove compartment. There are seven wires, color coded as follows; light blue, yellow, light green, red w/white stripe, dark green, black, brown.... 
-Rob
-Rob
12-29-2007, 06:17 PM
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Re: 91 92 tail's to 85 ta
I dunno then...Neither my 87 GTA nor the 89 GTA I parted out, and still have the harness from that I was referring to above, have the connector in your pics.
12-29-2007, 06:23 PM
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Re: 91 92 tail's to 85 ta
^ It's been awhile since I seen an earlier harness. He'll either need the pigtail running from the fusebox along with the piece that I posted, or he'll have to match up the '85-'92 wire for wire and solder them accordingly. Steve, how many wires run toward the back with the earlier harness....?
-Rob
-Rob
12-29-2007, 06:37 PM
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Re: 91 92 tail's to 85 ta
sounds like alot of bs i may just sell the lights instead, i won't hack up the harness in my car for nothing, the harness in my 85 is from a 89 so the plug is flat and plugs in beside the rear seat the 85 harness plugs in in the rear compartment and the 91 92 plugs in behind the rear glove box dr side i know where everything plug's up i need one that plugs in by the rear seat 89 firebird should do it
Last edited by intruder; 12-29-2007 at 06:40 PM.
12-29-2007, 11:04 PM
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Re: 91 92 tail's to 85 ta
^ It's been awhile since I seen an earlier harness. He'll either need the pigtail running from the fusebox along with the piece that I posted, or he'll have to match up the '85-'92 wire for wire and solder them accordingly. Steve, how many wires run toward the back with the earlier harness....?
-Rob
-Rob
89 GTA Tail Light harness
Close up of the main connector under the rear seat
I can go through thhe haness, to see which of the 6 wires go where.
Last edited by Stephen; 12-29-2007 at 11:11 PM.
02-28-2008, 11:32 PM
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Re: 91 92 tail's to 85 ta
I have a 92 and I want to put the 82-84 tail lights on my car. Has anyone here done this? Will I be able to wire the old 82-84 wire harness into my 92 harness?
03-02-2008, 08:35 PM
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03-02-2008, 09:49 PM
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Re: 91 92 tail's to 85 ta
I am doing a knight rider conversion and I want to put in the old tail lights. Mine is a formula
03-03-2008, 08:11 PM
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Re: 91 92 tail's to 85 ta
Converting tail lights isn't as easy as you would think. I thought it was when I converted my old 89 formula to an 86 TA light. Trans Am lighting is different than any of the other models even in the same year. Here is the problem I ran into with switching to the TA tails.
The difference is in the brake switch. When you step on the brakes a switch allows voltage to be sent to the tail lights. The voltage is sent to two different places. On the TA the voltage from the brake switch goes to the turn signal switch. This is where it will get a little complicated. On the formula the voltage bypasses the turn signal switch and goes straight to the tail lights.
Sometimes the same bulb is used for multiple functions. So if voltage is routed incorrect then all kinds of weird things happen. Like what you ask? Well when i stepped on the brakes my horn would sound. HAHAHA!
The difference is in the brake switch. When you step on the brakes a switch allows voltage to be sent to the tail lights. The voltage is sent to two different places. On the TA the voltage from the brake switch goes to the turn signal switch. This is where it will get a little complicated. On the formula the voltage bypasses the turn signal switch and goes straight to the tail lights.
Sometimes the same bulb is used for multiple functions. So if voltage is routed incorrect then all kinds of weird things happen. Like what you ask? Well when i stepped on the brakes my horn would sound. HAHAHA!
03-03-2008, 08:24 PM
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Re: 91 92 tail's to 85 ta
Converting tail lights isn't as easy as you would think. I thought it was when I converted my old 89 formula to an 86 TA light. Trans Am lighting is different than any of the other models even in the same year. Here is the problem I ran into with switching to the TA tails.
The difference is in the brake switch. When you step on the brakes a switch allows voltage to be sent to the tail lights. The voltage is sent to two different places. On the TA the voltage from the brake switch goes to the turn signal switch. This is where it will get a little complicated. On the formula the voltage bypasses the turn signal switch and goes straight to the tail lights.
Sometimes the same bulb is used for multiple functions. So if voltage is routed incorrect then all kinds of weird things happen. Like what you ask? Well when i stepped on the brakes my horn would sound. HAHAHA!
The difference is in the brake switch. When you step on the brakes a switch allows voltage to be sent to the tail lights. The voltage is sent to two different places. On the TA the voltage from the brake switch goes to the turn signal switch. This is where it will get a little complicated. On the formula the voltage bypasses the turn signal switch and goes straight to the tail lights.
Sometimes the same bulb is used for multiple functions. So if voltage is routed incorrect then all kinds of weird things happen. Like what you ask? Well when i stepped on the brakes my horn would sound. HAHAHA!
03-03-2008, 08:32 PM
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Re: 91 92 tail's to 85 ta
You need a wiring diagram for your car and for the car that the tail lights are from. Then find a taillight harness with a male and female connector and start splicing wires where they need to go. Color coded wires are your friend!
03-03-2008, 08:50 PM
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Re: 91 92 tail's to 85 ta
Haha this is not going to be fun, I'm colorblind haha. Where did you find the diagrams?
03-03-2008, 08:59 PM
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Re: 91 92 tail's to 85 ta
Converting tail lights isn't as easy as you would think. I thought it was when I converted my old 89 formula to an 86 TA light. Trans Am lighting is different than any of the other models even in the same year. Here is the problem I ran into with switching to the TA tails.
The difference is in the brake switch. When you step on the brakes a switch allows voltage to be sent to the tail lights. The voltage is sent to two different places. On the TA the voltage from the brake switch goes to the turn signal switch. This is where it will get a little complicated. On the formula the voltage bypasses the turn signal switch and goes straight to the tail lights.
Sometimes the same bulb is used for multiple functions. So if voltage is routed incorrect then all kinds of weird things happen. Like what you ask? Well when i stepped on the brakes my horn would sound. HAHAHA!
The difference is in the brake switch. When you step on the brakes a switch allows voltage to be sent to the tail lights. The voltage is sent to two different places. On the TA the voltage from the brake switch goes to the turn signal switch. This is where it will get a little complicated. On the formula the voltage bypasses the turn signal switch and goes straight to the tail lights.
Sometimes the same bulb is used for multiple functions. So if voltage is routed incorrect then all kinds of weird things happen. Like what you ask? Well when i stepped on the brakes my horn would sound. HAHAHA!
Then, during the Super Bowl, a STS controller was installed on his lights.
03-03-2008, 11:16 PM
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Re: 91 92 tail's to 85 ta
Which wire did he change that only took five minutes. I'm interested because mine wasn't that easy. If i did it incorrectly or if their is a better way to do it than I would be interested. I hate taking the long way around when there is an easy fix. Let us know the exact details how he did it. Thanks.
03-03-2008, 11:22 PM
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Re: 91 92 tail's to 85 ta
Which wire did he change that only took five minutes. I'm interested because mine wasn't that easy. If i did it incorrectly or if their is a better way to do it than I would be interested. I hate taking the long way around when there is an easy fix. Let us know the exact details how he did it. Thanks.
03-04-2008, 11:15 AM
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Re: 91 92 tail's to 85 ta
Wow, I have been polishing my 91-92 Trans am taillights and was going to start researching this topic. I thought it was going to be a fairly simple installation. I know people have done this, why are things getting so much more complicated then they should be??
03-04-2008, 01:44 PM
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Re: 91 92 tail's to 85 ta
sounds like alot of bs i may just sell the lights instead, i won't hack up the harness in my car for nothing, the harness in my 85 is from a 89 so the plug is flat and plugs in beside the rear seat the 85 harness plugs in in the rear compartment and the 91 92 plugs in behind the rear glove box dr side i know where everything plug's up i need one that plugs in by the rear seat 89 firebird should do it
Its easy bud give me a call. I lost my old cell n a glass of milk.. so I dont have your number.
03-04-2008, 08:16 PM
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Re: 91 92 tail's to 85 ta
Yeah. I have an extra set of GTA tail lights, and I've had good friends begging for them. But if I ever need a set, I can only imagine what I'd pay, besides with every day that goes by, they'll get harder to find, and the asking price will go higher.
03-05-2008, 09:30 PM
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Re: 91 92 tail's to 85 ta
I am assuming that you are talking about the 3 part 85-90 taillights...
I am talking about the 2 part 1991-1992 TA/GTA taillights. Those go for big money and are the ones I am trying to wire into my 88 Formula.
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