Wiring Assistance
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Joined: Jun 2020
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Car: 1983 firebird TransAm
Engine: 5.0 L CFI
Transmission: Auto
Wiring Assistance
Hello to you!
I am having difficulty identifying these wires and their function. This is a 1983 25th Anniversary Trans Am 305 Cross fire fuel system that is in process of restoration. Unfortunately, the mice enjoyed the wiring and plastic on the driver's side. The black wire with the blade was located in a plastic "L" shaped holder, while the other connector with the three wires, I have no idea. These originate from a connector off of the harness. Also, the Green wire had a type of plastic guide on the end that I can not locate an area to plug in. The green wire is hot during run only, while there is no activity in the other wires. Could this be a melted connection that goes to the wiper/cruise system?
Thank you and any help is greatly appreciated!! This is my first car and was driving up until 15 years ago and I would like to have it going again before my 60th birthday!
MLF
I am having difficulty identifying these wires and their function. This is a 1983 25th Anniversary Trans Am 305 Cross fire fuel system that is in process of restoration. Unfortunately, the mice enjoyed the wiring and plastic on the driver's side. The black wire with the blade was located in a plastic "L" shaped holder, while the other connector with the three wires, I have no idea. These originate from a connector off of the harness. Also, the Green wire had a type of plastic guide on the end that I can not locate an area to plug in. The green wire is hot during run only, while there is no activity in the other wires. Could this be a melted connection that goes to the wiper/cruise system?
Thank you and any help is greatly appreciated!! This is my first car and was driving up until 15 years ago and I would like to have it going again before my 60th birthday!
MLF
Joined: Sep 2005
Posts: 27,866
Likes: 2,428
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Wiring Assistance
The large black 4-pin one plugs into the distributor. Its mate should be hanging out of it.
The green wire goes t the temp gauge sending unit. It's in the driver's side head between the #1 & #3 spark plugs; the front 2 on that side.
Not sure about the small flat one.
The green wire goes t the temp gauge sending unit. It's in the driver's side head between the #1 & #3 spark plugs; the front 2 on that side.
Not sure about the small flat one.
Thread Starter
Junior Member
Joined: Jun 2020
Posts: 20
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Car: 1983 firebird TransAm
Engine: 5.0 L CFI
Transmission: Auto
Re: Wiring Assistance
Thank you for your response. The distributor in on the passenger side and this is on the driver side, so it is too far to plug into. I will continue to look.
Joined: Sep 2005
Posts: 27,866
Likes: 2,428
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Wiring Assistance
The distributor is dead center, at the very rear of the motor, almost buried into the firewall; round, has 8 spark plug wires coming out of it. Hanging out of the base will be (or at least there was at one time) the matching harness to that plug.
Thread Starter
Junior Member
Joined: Jun 2020
Posts: 20
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Car: 1983 firebird TransAm
Engine: 5.0 L CFI
Transmission: Auto
Re: Wiring Assistance
Hello there,
Thank you for your assistance. Finally, I found the location at the distributor that you discussed and everything plugged in nicely!! The green wire also follows to the sensor unit for the temperature. She actually "Fired off" today and now needs timing.
Thank you again!!
Melissa F
Thank you for your assistance. Finally, I found the location at the distributor that you discussed and everything plugged in nicely!! The green wire also follows to the sensor unit for the temperature. She actually "Fired off" today and now needs timing.
Thank you again!!
Melissa F
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From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Wiring Assistance
The photo of the single green wire, is that of a loose terminal without a connector body.
The connector body most likely broke apart/ fell off from age/ cracking.
If you could try and take some more pictures of where the wire goes... I can try and figure out what it is for.
Is your vehicle definitely a 1983 model? I ask because the 25th anniversary Trans-Am was in 1994.
1989 was the 20th anniversary, and 1984 was of course the 15th.
The connector body most likely broke apart/ fell off from age/ cracking.
If you could try and take some more pictures of where the wire goes... I can try and figure out what it is for.
Is your vehicle definitely a 1983 model? I ask because the 25th anniversary Trans-Am was in 1994.
1989 was the 20th anniversary, and 1984 was of course the 15th.
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Joined: Sep 2005
Posts: 27,866
Likes: 2,428
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Wiring Assistance
She already found it; as described, it was the temp gauge sending unit. 
Now, that little flat brown one with looks like 3 wires, I think that one is still up for grabs.

Now, that little flat brown one with looks like 3 wires, I think that one is still up for grabs.
Supreme Member




Joined: Jul 2006
Posts: 2,859
Likes: 785
From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Supreme Member




Joined: Jul 2006
Posts: 2,859
Likes: 785
From: 212 is up in this Bit@#
Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Wiring Assistance
Damn, I can not find my Cross-Fire engine wiring documents for F-Bodies...
Maybe I have the Corvette documents; I'll see if I can rule-out that 3-terminal connector as an engine related connector.
Maybe I have the Corvette documents; I'll see if I can rule-out that 3-terminal connector as an engine related connector.
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