The car has just been in the garage for a new air suspension compressor and they told me that also the tow hook was giving conflicting errors to the computer so they would disconnect it. I was getting an error message 'check trailer lights'. Sounds a bit of a coincidence to me?
My lower tailgate switch is not working and neither are the reverse lights. I noticed an earlier post in 2010 but no positive response. The fuses are OK. Is this a relay that needs replacing, if so which one?:(