Twin Electrics - newbie help

[taffwalters]

HI, I have a tow bar fitted with twin electrics same as my caravan. I’ve checked all the lights and they work fine except the reverse light. Now as I understand it this is powered by the grey lead - is there anything the grey lead should do that would tell me that it is working properly? I know that the reverse light was working last when connected to another vehicle!

Thanks in advance.

 

[JayTea]

Nothing to see here...

 

[Damian]

If the van reverse light worked on another vehicle but not on yours, the first pace to look is the 12s socket on your car.