I have attached a universal relay but the towbar lights do not work?? see image

There is power but lights do not work?

Do i need to add something? help!

Just to confirm I have fitted the towbar and wiring as stated on the products i brought to do this.

is this the problem?? - multiplexed CAN bus electrical system.

I need a cheap quick solution.

Mark

Fitted a maypole one to my old Seat and no probs. Similar age of car plus can bus. If your getting 12v to relay then maybe check your getting a good earth. On the maypole one there is only a live feed and the earth is on the car side section of relay. Check the trailer socket wiring again especially earth as its fairly easy to trap insulation rather than copper cable. I would also check car socket with multimeter in case theres a problem with the trailer lights.

Alasdair

Have you tried the reset procedure stated on the interface label?

maypole?

"reset procedure stated....Label"

No idea what this means?

Maypole is the name of the company that made the one I got.

20 minutes ago, salma said:

"reset procedure stated....Label"

No idea what this means?

On the image you posted, there are instructions under 'Note' on how to reset it.

On yours there are seven wires going to trailer but white cable on a seven pin is usually earth number 3 from memory. As far as I know 7 pin sockets dont have reverse connection in uk. The way its wired up not sure where the trailer is getting earth from. If you need reverse you need to upgrade to 13 pin socket etc.

Alasdair

Check the car socket to see what wire colour is on pin 3 which should be earth and normally white. If its white I would move it from terminal (a) on the trailer side of the bypass relay to the earth connection on bypass relay

Alasdair

Edited 6 June6 Jun by Alasdair1