Towbar wiring on 2008 Relay van.

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paul in normandy
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Joined: 25 Jan 2010, 19:45

Towbar wiring on 2008 Relay van.

Post by paul in normandy »

Fitted towbar OK - its a Brink one and very simple fitting. But I've got a problem with the wiring. Connected into the correct wires close to the rear light units. Indicators work fine on both sides, but I've got a problem with the side and brake lights. When the lighting board is connected into the towing socket the sidelights come on for about 5 seconds then go off / switch off lights, switch back on, lights on for 5 secs etc ad infinitum...... It does the same on both the lighting and brake light circuits. Any ideas where to start looking in order to rectify the problem. Many thanks for any assistance.
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GiveMeABreak
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Re: Towbar wiring on 2008 Relay van.

Post by GiveMeABreak »

We'll need your VIN in order to check the correct lighting circuit.
paul in normandy
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Joined: 25 Jan 2010, 19:45

Re: Towbar wiring on 2008 Relay van.

Post by paul in normandy »

VF7**************[VIN obfuscated, can be read by forum staff] is the VIN no.
Thanks
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GiveMeABreak
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Re: Towbar wiring on 2008 Relay van.

Post by GiveMeABreak »

Ok, just so you know, data for the Relay and Boxer vans is slightly better than useless - probably because these are Fiats / Ford combos with nothing Citroen or Peugeot in them. The wiring numbers are non-descript so I cannot provide you with specifics - but you should be able to work out what is what. I will show these individually for each lamp - once you identify the earths, the remaining should be the power.

Brake Lamps:
Relay Brake Lamps.PNG
2630: rear LH lamp unit on the body
2635: right-hand tail lamp
2110: additional brake lamps

So anything 'MC' is an earth point - MC69, MC70 etc.
Rear Sidelights
Relay SidelightA.PNG
Relay SidelightA.PNG (12.57 KiB) Viewed 27 times
Relay SidelightB.PNG
2630: Rear LH lamp unit on the body2635: right-hand tail lamp
Reversing Lights
Relay Reverse.PNG
2630: Rear LH lamp unit on the body
2635: Right-hand tail lamp
2200: Reverse lamp switch
Fog Lamps
Relay Fog.PNG
2630: rear LH lamp unit on the body
2635: right-hand tail lamp
Hopefully this is what you need.
paul in normandy
Posts: 82
Joined: 25 Jan 2010, 19:45

Re: Towbar wiring on 2008 Relay van.

Post by paul in normandy »

Thanks for that. I've managed to work out which wires are which, the problem I'm trying to resolve is why the side and brake lights work correctly until the towing socket is connected, and then they will work for only a couple of seconds before going off.
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GiveMeABreak
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Re: Towbar wiring on 2008 Relay van.

Post by GiveMeABreak »

May be something to do with the load on the circuit... A lot of cars have a separate trailer fuse box that is connected to the battery directly and then supplies fused power to the trailer and cuts out the reversing assistance / activates a special ESP programme for towing.