89 GTA Steering Wheel Audio Controls Circuit Diagram
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Junior Member
Joined: Jun 2014
Posts: 17
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From: Adelaide, Australia
Car: 1989 GTA
89 GTA Steering Wheel Audio Controls Circuit Diagram
Does anyone have a circuit diagram for the steering wheel audio control unit for a 1989 GTA Trans Am?
Backlighting is OK, but no controls are working. I've checked the voltages on the orange wire, should be 4.7V fluctuating when key pressed -but is only 0.7V and fluctuating around 1.4 to 1.6V as a key is pressed. Info from another post.
A circuit diagram of the board would be really helpful to debug the issue - or has anyone knowledge about this board?
Backlighting is OK, but no controls are working. I've checked the voltages on the orange wire, should be 4.7V fluctuating when key pressed -but is only 0.7V and fluctuating around 1.4 to 1.6V as a key is pressed. Info from another post.
A circuit diagram of the board would be really helpful to debug the issue - or has anyone knowledge about this board?
Senior Member
iTrader: (1)
Joined: Dec 2012
Posts: 808
Likes: 5
From: Tucson, AZ
Car: 88 GTA Notchback
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: don't know
Re: 89 GTA Steering Wheel Audio Controls Circuit Diagram
Look here. It is for an 88 but should be the same.
https://www.thirdgen.org/forums/car-...ml#post5781524
https://www.thirdgen.org/forums/car-...ml#post5781524
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