After an attempt to install aftermarket audio equipment, I have lost control of the mode button as well as the hazzard button on the panel. AC, lights work fine, but no audio controls.

I have checked and replaced a blown fuse in the cabin, but it seems that there is a relay or fuse somewhere that is preventing control of audio sources etc.

Nav Screen and Rear trunk unit were removed to try and isolate them as causes.

Any insights would be great.

 

Your fiber MOST cable is likely not connected or broken

 

Thanks for the reply. would that affect the hazzard switch? Battery is also draining very quickly leading me to think a relay is shorted.