Not the usual control knob problem

[PeteDawson63]

Hi All,
I have what I believe to be a short circuit problem on the control knob. It needs to be rewired and I was wondering if anyone has any idea of wiring for this item?
I thought I'd try repairing myself, but it will end up at the local garage if there's no info to be had.
Any help would be very wecome.

 

[richard]

How have you decided its a 'short circuit' problem - that is a stange thing and there is almost no wiring to be re-wired (its a ribbon cable). It takes power and CAN bus (The telematics can bus). I suspect that no garage will be able to repair it, they are mechanics not electronics engineers.They will want to replace it. Sadly you are a bit far from Lightwater in Surrey.
Unless somehow the wiring has been cut ?

R

 

[PeteDawson63]

How have you decided its a 'short circuit' problem - that is a stange thing and there is almost no wiring to be re-wired (its a ribbon cable). It takes power and CAN bus (The telematics can bus). I suspect that no garage will be able to repair it, they are mechanics not electronics engineers.They will want to replace it. Sadly you are a bit far from Lightwater in Surrey.
Unless somehow the wiring has been cut ?

R

Hi Richard,
Thanks for the input, much appreciated.
I had the car fully scanned for error codes and it came back with a C253500. (also C253400 and C243800) Looking around on the internet I found someone who had the same code and it turned out to be a short circuit in the cigerette lighter. Putting 2 and 2 together, I figured my command knob being dead might be something similar. I have replaced the command knob and no luck. I also replaced the radio unit with no luck (tried each combination to make sure both new units were tried together)
I'm assuming there is a short somewhere in the wiring after the connection near te gear lever. I may be barking up the wrong tree, but seemed reasonable to me.
I have tried my local electricians and he couldn't find a wiring diagram, so no luck there. My plan is to remove the centre consol and trace the wires to a connection beyond the plug near the gear lever to check for problems or to rewire if necessary.