Towbar wiring diegram

DavidMartin · Oct 26th, 2011, 15:12

Hiya Guys,
Can anyone help i have just fitted a towbar to my 98 S40 but i didnt get a wiring diagram with it, I have looked all over the net and cant find one.

So if anyone has got any links or have fitted a towbar and still have the wiring diagram to hand could you let know what colour wires go where.

Thanks in advance

pphilpot · Oct 26th, 2011, 16:15

Hi David - what are you looking for exactly? I'm guessing that you have fitted a relay and are looking which relay wires are for which lights... Correct?

If so, try this:

DavidMartin · Oct 26th, 2011, 17:12

Hi pphilpot, Thats the relay i have and yep thats what i was after

Thank you pphilpot

sebaveh · Oct 26th, 2011, 20:08

Towbar electric on s40/v40 , 1996 - 2004 can be routed directly from rear lights, no other drivers or interfaces are needed. Also you can find grey 4-pole connector with permanent supply, switched supply, ground and brake light, at the LH rear light. Don't forget to replace flasher relay with stronger one, and maybe route extra contact and wire from C2 terminal on flasher, to instrument cluster for trailer flasher control light.
One minor thing of OEM wiring harness is some relay in the middle, that cuts out the car's foglight, so that it lits only on trailer.

DavidMartin · Oct 26th, 2011, 20:34

Very comfusing :/

DavidMartin · Oct 26th, 2011, 20:42

Here are the two boxes i got with the towbar

I know now what the black box is for, But whats the other box for?

Oct 26th, 2011, 15:12	#1
DavidMartin New Member Last Online: Nov 3rd, 2011 12:31 Join Date: Oct 2011 Location: Westward Ho! North Devon	Towbar wiring diegram Hiya Guys, Can anyone help i have just fitted a towbar to my 98 S40 but i didnt get a wiring diagram with it, I have looked all over the net and cant find one. So if anyone has got any links or have fitted a towbar and still have the wiring diagram to hand could you let know what colour wires go where. Thanks in advance

Oct 26th, 2011, 16:15	#2
pphilpot Premier Member Last Online: Jan 19th, 2024 15:24 Join Date: Oct 2006 Location: Woodbridge, Suffolk	Hi David - what are you looking for exactly? I'm guessing that you have fitted a relay and are looking which relay wires are for which lights... Correct? If so, try this: __________________ ---------------------------------------------------------------------- Current: 2011 C30 1.6 D2 R-Design (155,000) Previous: 2004 S40 1.9D; 2004 S60 D5; 1996 V40 2.0; 1989 740 2.4 T Last edited by pphilpot; Oct 26th, 2011 at 16:23.

Oct 26th, 2011, 17:12	#3
DavidMartin New Member Last Online: Nov 3rd, 2011 12:31 Join Date: Oct 2011 Location: Westward Ho! North Devon	Hi pphilpot, Thats the relay i have and yep thats what i was after Thank you pphilpot

Oct 26th, 2011, 20:08	#4
sebaveh Winegrover Last Online: Jul 17th, 2019 11:08 Join Date: Nov 2009 Location: Slovenska Bistrica	Towbar electric on s40/v40 , 1996 - 2004 can be routed directly from rear lights, no other drivers or interfaces are needed. Also you can find grey 4-pole connector with permanent supply, switched supply, ground and brake light, at the LH rear light. Don't forget to replace flasher relay with stronger one, and maybe route extra contact and wire from C2 terminal on flasher, to instrument cluster for trailer flasher control light. One minor thing of OEM wiring harness is some relay in the middle, that cuts out the car's foglight, so that it lits only on trailer.

Oct 26th, 2011, 20:34	#5
DavidMartin New Member Last Online: Nov 3rd, 2011 12:31 Join Date: Oct 2011 Location: Westward Ho! North Devon	Very comfusing :/

Oct 26th, 2011, 20:42	#6
DavidMartin New Member Last Online: Nov 3rd, 2011 12:31 Join Date: Oct 2011 Location: Westward Ho! North Devon	Here are the two boxes i got with the towbar I know now what the black box is for, But whats the other box for?

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