I have just fitted a new towbar to my Vectra 1.8 petrol with twin electrics.
I have also fitted a universal 7 way smart bypass relay AEU7R/TEB7AS and wired up as per instructions coupling to cars live and earth as described then scotchlocking into wires for rear lights L & R, indicators L & R, brake light, fog and reverse.
Nothing works on caravan electrics when coupled up!
When indicators are switched on there is audible noise from relays in boot but no lights work on caravan.
I have also fitted a seperate relay AESSCR for the caravan fridge e.t.c. No power to that either!
There is power to some of the relay connections when I put multmeter on
Thanks in advance