I have a 87 2.8 Firebird.

 

I believe it goes like this...

LtGray- right front (+)
Dkgreen- right front (-)

Tan- left front (+)
Gray-left front (-)

DkBlue- right rear (+)
LtBlue- right rear (-)

Brown- left rear (+)
Yellow- left rear (-)

~~Jaime~~

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1987 TransAm
350 sbc
Holley 750 Vac sec
Edelbrock Performer Rpm Heads/Intake/Cam
Flowtech Ceramic Headers
Crane Roller tip Rockers/pushrods
Flowmaster Muffler

 

I have an '88 T/A GTA and was going to ask the same question. Any chance the cars share the same colors?

thanks, Frank

 

thanks.. I think that's correct.

 

I'm pretty sure it is the same for the 88. I can't remember what year they changed the connector to the smaller one, and if they kept the same wire colors. I can look it up if nobody knows for sure.

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Working on:
'84 Z28 LG4 305
Added dual elec fans.
145 MPH IROC Speedo
Building 430 HP 350
using primarily GMPP parts.
Block is in shop!

Starting to look like the Kicker poster child!

 

GM has used the same wire colors on all its cars for like forever.

Just remember that there are actually two yellow and two gray wires. One of the yellows is switched 12V+, and the other one i think is dash illumination...12V+ switched by the headlight switched, and regulated by the dashboard dimmer.