Towbar Electrics

[Leon]

I have a 03 C5 Hatchback 2.0 HDI VTR. I have installed a towbar and purchased a twin electrics kit with relays and everything. I am trying to obtain an installation guide. Does anyone know where I can get one?

[kfk]

Check you have the correct parts....the C5 shouldnt be wired up with a conventional towbar wiring kit.

 

Due to its electrical system it will require a bypass relay kit. see the Witter website for details:

 

http://www.witter-towbars.co.uk/accessorie.../electrics.aspx

[paul.h]

I wired up a towbar on 04, 2.2 VTR this year.

 

The wiring kits will explain which wires go where, as KFK notes, use a 7-way bypass relay for the 12N socket and 12S socket reversing lights. Life will be easier if you use a Citroen kit.

 

At the back of the boot, under the plastic trim and carpet there is a trailer socket for the 12N lighting - I did not use this due to cost of Citroen parts and also the voltages were odd and not 12V. Instead I used the blue connectors to tie in to the lights to each car rear light and took these to the bypass relay and then the 12N and 12S sockets. I will add the lighting wire colours later.

 

I could not find any 12V supply in the boot with a high amp rating so the 12V positive supplies to the bypass and charging relays I took direct from the car battery clamp bolt, through a large wiring grommet into the car at the left passenger footwell (this was the difficult bit - first part pushed a welding rod through and fastened the cable to this and pulled it through with lots of WD40, removed windscreen plastic scuttle to improve access) and along the left side of the car into the boot - each wire needs to be at least 21 amp with 15 amp fuses at the battery end.

 

An earth point in the boot was used for the earth wires - again use 21 amp for the 12S socket.

 

Once wired up and checked, I stuck the relays to the back and side of the boot using sealant.

 

Rear light wiring colours:

 

left hand

- orange - left indicator *

- white/grey - fog

- white thick - stop

- yellow - left tail *

- white thin - reverse

 

right hand

- end grey - fog *

- blue - right indicator *

- white (next to grey) - right tail *

- white (next to blue) - stop *

- grey - reverse *

The ones with a * are the ones I connected to the 7 way relay with blue snap connectors.

Edited November 22, 2006 by paul.h

[iannez]

if you can get a citroen harness it piggy backs the multi plug in the back of the light cluster and all you have to do is splice into a live and take another wire to earth.