[macafee2]

The towing electrics on a CDTI are a piece of cake. As our cars are "old" there is no complicated electrics.

There is no order to checking

check the fuse and power take off point that is probably in the passenger footwell.
Do bear in mind it/they may or may not be ignition live.
The power for the towing electrics may be piggy backed off another fuse. There may be more then 1 fuse but it will be in the same area and depending if the towing electrics are wired for a caravan or a trailer with just road lights

If it seems power is being sent to the to the towing electrics find the relay at the back of the car that connects to the cars harness and to the tow socket. It may be on the boot on the right under the insulation. Make sure power is getting to that.

Then check at the towing socket. Have you 7 pin or 1 pin socket?
Google 7 pin wiring or 13 pin wiring and you will see which pin does what.

Check the earth pin as no earth will equal no electrics.
You may me able to, probably can check each pin for power as required without the trailer being connected.
If you put an indicator on and check the socket you should with a multi meter see 12v going on and off, easy with a needle type meter, not so clear with a digital meter.


fret not, give it a go and if you get stuck, come back.

if you have a 7 pin plug and socket, spread the pins apart a little the pins that have a slot in them.

macafee2