4th Gen Dash Woes...Left Over Wires, Confusion On Connectors....
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Supreme Member
Joined: Jul 2005
Posts: 1,423
Likes: 1
From: Miramichi, NB
Car: 86 Monte Carlo
Engine: Blown 489
Transmission: TH400
Axle/Gears: 9" 370s
4th Gen Dash Woes...Left Over Wires, Confusion On Connectors....
ok well only 3 problems really...mostly since this is an 86 Trans Am.
1) Defrost - hook what to what? i seen on another post my 3rd gen wires are just a timer, and arent for the actual defrost and need to find a box? which i dont know where that is.
3rd gen - purple/white, blue, gray, black, pink/black
4th gen - orange, purple, black, brown
2) HVAC
Ok, i have an 86 trans am and i had non a/c, just hot and cold. They were operated with cable wires, not the colored vacuum hoses that everyone seems to have. The only thing i would like to know is where to locate the hot/cold cable to change with the 4th gen one?
3) 86 Trans Am Cluster Connectors
Top - Black
Hand Brake Indicator - Tan/White
Ground - Black
Illumination - Grey
Not Used - Dk Grey
Not Used - Black/White
Not Used - Pink/Black
Left Blinker - Blue
High Beams - Green
Right Blinker - Blue
Fuel Level - Pink
Not Used - None
SES Light - Yellow x 2
Skip Shift Indicator - Tan/Black x 2
Bottom - White
Tach - White
Ground - Black
Illumination - Gray
Choke/Security Indicator - Blue
Water Temp - Green
Not Used - None
Not Used - None
Oil Pressure - Tan
Power - Pink/Black
Not Used - None
Not Used - None
Ground - Black
Seatbelt - Yellow
Speedometer - Green/Black
I checked these twice and seems that im only having 4 problems...I have no idea where these wires go, anyone help?
1) 4- Dark Grey - some kind of illumination??
2) 5- Black/White - was told to ground this (maybe splice it into a ground wire?)
3) 6- Pink/Black - was also told its power wire, so splice it into Pink/Black on white-bottom connector?
4) 12- Brown x 2 - on 85 camaro this is for speedometer?
1) Defrost - hook what to what? i seen on another post my 3rd gen wires are just a timer, and arent for the actual defrost and need to find a box? which i dont know where that is.
3rd gen - purple/white, blue, gray, black, pink/black
4th gen - orange, purple, black, brown
2) HVAC
Ok, i have an 86 trans am and i had non a/c, just hot and cold. They were operated with cable wires, not the colored vacuum hoses that everyone seems to have. The only thing i would like to know is where to locate the hot/cold cable to change with the 4th gen one?
3) 86 Trans Am Cluster Connectors
Top - Black
Hand Brake Indicator - Tan/White
Ground - Black
Illumination - Grey
Not Used - Dk Grey
Not Used - Black/White
Not Used - Pink/Black
Left Blinker - Blue
High Beams - Green
Right Blinker - Blue
Fuel Level - Pink
Not Used - None
SES Light - Yellow x 2
Skip Shift Indicator - Tan/Black x 2
Bottom - White
Tach - White
Ground - Black
Illumination - Gray
Choke/Security Indicator - Blue
Water Temp - Green
Not Used - None
Not Used - None
Oil Pressure - Tan
Power - Pink/Black
Not Used - None
Not Used - None
Ground - Black
Seatbelt - Yellow
Speedometer - Green/Black
I checked these twice and seems that im only having 4 problems...I have no idea where these wires go, anyone help?
1) 4- Dark Grey - some kind of illumination??
2) 5- Black/White - was told to ground this (maybe splice it into a ground wire?)
3) 6- Pink/Black - was also told its power wire, so splice it into Pink/Black on white-bottom connector?
4) 12- Brown x 2 - on 85 camaro this is for speedometer?
Last edited by roughskinjrz; Jun 20, 2006 at 08:06 PM.
Thread Starter
Supreme Member
Joined: Jul 2005
Posts: 1,423
Likes: 1
From: Miramichi, NB
Car: 86 Monte Carlo
Engine: Blown 489
Transmission: TH400
Axle/Gears: 9" 370s
so noone knows where to mount the cable for hot/cold from the 4th gen controls onto the 3rd gen car?
and noone ever did a 4th gen swap and included the deforst to work on a firebird?
for the wires....the gray for illumination can i hook that up to any illumination on the 4th gen connector?
as for the 2 x brown wires together anyone know what these are for?
and noone ever did a 4th gen swap and included the deforst to work on a firebird?
for the wires....the gray for illumination can i hook that up to any illumination on the 4th gen connector?
as for the 2 x brown wires together anyone know what these are for?
Senior Member
Joined: Jan 2004
Posts: 678
Likes: 0
From: Connecticut
Car: '89 Firebird Formula
Engine: 305 TBI
Transmission: T5
well the controls you have obviously use vacuum to control the doors, and has no place for a cable, sooo in all likelyhood your going to have to change your setup over to use vacuum actuators, or keep your stock controls if possible
Supreme Member

Joined: Jun 2003
Posts: 2,733
Likes: 2
From: Or-eh-gun
Car: 2012 Nissan Leaf
Engine: 80-kW AC synchronous electric motor
Transmission: Automatic
Axle/Gears: n/a
yes, you will need to convert to an electronic/vaccume controlled HVAC heater/AC box out of a GTA or somthing
Thread Starter
Supreme Member
Joined: Jul 2005
Posts: 1,423
Likes: 1
From: Miramichi, NB
Car: 86 Monte Carlo
Engine: Blown 489
Transmission: TH400
Axle/Gears: 9" 370s
ok obviously you guys dont know what i mean, take a look at my 4th gen controls, there is a cable there so yea i need to know where it goes.
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