Steering wheel change - buttons and horn not working
I've just had my steering wheel changed over, unfortunately I didn't look hard enough when buying the (to me) new one and it had a slightly different arrangement of buttons.
I didn't think much of it, had my indy change over the contact plate and button modules but the horn and buttons still don't work, however pressing the upshift paddle looks to perform the action of the back or ok button 9 times out of 10.
Does anybody have any clue how to fix it and/or why it doesn't work? The only thing I can think of is that the paddle shifters are not playing well and I don't think these can be changed over as they appear to be a different size (pictures attached, chrome paddle shifters is the new steering wheel with buttons from old steering wheel)
?
Last edited by Andy74; Apr 19, 2021 at 09:30 PM.
After prodding the seller, the new steering wheel came out of 2017 C218.
What I don't understand is why would it still not work despite having both the buttons and contact plate switched over from the old steering wheel
After prodding the seller, the new steering wheel came out of 2017 C218.
What I don't understand is why would it still not work despite having both the buttons and contact plate switched over from the old steering wheel

I just went by the shape (changing to flat bottom from round steering wheel) and I know that was a mistake but I'm trying to work out if it's the paddle shifters or something else entirely, but other than those and the frame there is nothing on there from the new steering wheel so I'm just trying to pick some brains.
Also the last 2 pictures in my first post is the old steering wheel with new buttons.
It was quite a steal money wise and it's almost immaculate.
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Even though they are different (in reality, they are not), I am thinking something is off in regards to the wiring.
I'll open it up tomorrow to see if all the cables are seated properly and getting any voltage from the cluster side's wiring.
Would anybody know the pinout of the black plug or have a rough idea of what it should measure, 2.5V maybe?




It would be the other harness, neither the horn nor the airbag is connected to. It would be hard to mess those two up.
I've used copious amounts of contact cleaner (after disconnecting the battery of course) and then taped the plug connected and everything decided to work just fine.
I've used copious amounts of contact cleaner (after disconnecting the battery of course) and then taped the plug connected and everything decided to work just fine.




