S40 Towbar Electrics

001ben · Jan 5th, 2013, 16:54

Hi All,

Im sure its been asked 100 times but cant find the answer. I have just fitted a s****neck witter towbar to my S40 . I bought a by pass relay for the electrics, the plan was to splice into the rear lights to connect the 7 pin socket however i have read that you need the volvo specific wiring module unit as splicing into the lights will cause problems with the car.

Can sopmeone please advise if i can use the unit I have or if there are any alternatives that can be used, easier the better.

If it makes a difference the car is a 2009 S40 2.5 T5, but im sure it will be the same for all of them.

JAB1 · Jan 6th, 2013, 03:33

Quote:

Originally Posted by 001ben

Hi All,

Im sure its been asked 100 times but cant find the answer. I have just fitted a s****neck witter towbar to my S40 . I bought a by pass relay for the electrics, the plan was to splice into the rear lights to connect the 7 pin socket however i have read that you need the volvo specific wiring module unit as splicing into the lights will cause problems with the car.

Can sopmeone please advise if i can use the unit I have or if there are any alternatives that can be used, easier the better.

If it makes a difference the car is a 2009 S40 2.5 T5, but im sure it will be the same for all of them.

I have a 2008 1.8 s40 with towbar electrics fitted and work fine.
My relay is powered from the 12v suppy in the boot (right hand side)
Instead of splicing into the rear lights the kit i used came with scotch clips, (£1.39 for 10 from ebay)http://www.ebay.co.uk/itm/Blue-Snap-...item519ef2615d and works great so i would recomend using them!
I have never had and problems doing this!

Hope this helps JB

001ben · Jan 6th, 2013, 13:21

yes that helps alot. The kit I have has the scotch clips, although I didn't know how to use them until a minute ago. Where did you route the cables?

has anyone else wired there trailer up in this way?

nbuuifx · Jan 6th, 2013, 14:38

I fitted mine but it was literally plug and play, I just had to unpug some plugs and plug these between - took 5 mins if that.

001ben · Jan 6th, 2013, 14:47

Quote:

Originally Posted by nbuuifx

I fitted mine but it was literally plug and play, I just had to unpug some plugs and plug these between - took 5 mins if that.

what make was the plug and play unit? do you remember where you bought it from?

nbuuifx · Jan 6th, 2013, 16:19

I bought it from here second hand with a detachable tow bar,

Pretty sure the box/instructions are in the garage but I'll do a search on here first to see if it said the make in the post

nbuuifx · Jan 6th, 2013, 16:23

The towbar is a witter, the wiring kit is Brink

001ben · Jan 6th, 2013, 21:05

thanks for checking, thats the same towbar make as mine. I will have a look to see what options Brink have for the loom then.

JAB1 · Jan 7th, 2013, 05:55

Quote:

Originally Posted by 001ben

yes that helps alot. The kit I have has the scotch clips, although I didn't know how to use them until a minute ago. Where did you route the cables?

has anyone else wired there trailer up in this way?

The relay just sits in behind the left hand light in one of the panels, as there is a grommet really close to route the cable for the towbar electrics.
and ran the 12v cable behind the plastics for the boot trim.

Jan 5th, 2013, 16:54	#1
001ben New Member Last Online: May 11th, 2014 11:13 Join Date: Dec 2010 Location: Chester	S40 Towbar Electrics Hi All, Im sure its been asked 100 times but cant find the answer. I have just fitted a s****neck witter towbar to my S40 . I bought a by pass relay for the electrics, the plan was to splice into the rear lights to connect the 7 pin socket however i have read that you need the volvo specific wiring module unit as splicing into the lights will cause problems with the car. Can sopmeone please advise if i can use the unit I have or if there are any alternatives that can be used, easier the better. If it makes a difference the car is a 2009 S40 2.5 T5, but im sure it will be the same for all of them.

Jan 6th, 2013, 13:21	#3
001ben New Member Last Online: May 11th, 2014 11:13 Join Date: Dec 2010 Location: Chester	yes that helps alot. The kit I have has the scotch clips, although I didn't know how to use them until a minute ago. Where did you route the cables? has anyone else wired there trailer up in this way?

Jan 6th, 2013, 14:38	#4
nbuuifx Senior Member Last Online: May 1st, 2015 23:01 Join Date: Dec 2011 Location: Staffs	I fitted mine but it was literally plug and play, I just had to unpug some plugs and plug these between - took 5 mins if that.

Jan 6th, 2013, 16:19	#6
nbuuifx Senior Member Last Online: May 1st, 2015 23:01 Join Date: Dec 2011 Location: Staffs	I bought it from here second hand with a detachable tow bar, Pretty sure the box/instructions are in the garage but I'll do a search on here first to see if it said the make in the post

Jan 6th, 2013, 16:23	#7
nbuuifx Senior Member Last Online: May 1st, 2015 23:01 Join Date: Dec 2011 Location: Staffs	The towbar is a witter, the wiring kit is Brink

Jan 6th, 2013, 21:05	#8
001ben New Member Last Online: May 11th, 2014 11:13 Join Date: Dec 2010 Location: Chester	thanks for checking, thats the same towbar make as mine. I will have a look to see what options Brink have for the loom then.

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