steering wheel buttons
Mitchell
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Seriously, I wouldn't even mess with the switches since it's unlikely that the switches themselves are the problem. The chance that all the switches went bad at once is extremely small. You should check those parts of the circuit that all the switches have in common. Start with the fuse then move on to the wire and finally the head unit.
There is only one wire in and one wire out for the steering wheel controls. Power comes from the fuse panel to the switches which are wired in series with different resistors attached to each one. Different total amounts of resistance are introduced into the circuit depending on what combination of switches are pressed. Check that power is reaching the switches then check that power reaches the head unit when any buttons are pressed. If power isn't getting to the switches then check if power is getting to the top of the steering column - it could be the slip ring contacts (between the steering wheel and the top of the column) causing the break in the circuit.










