Thread: Disco4 towing question

Originally Posted by shamirj

Prob easiest quick fix for now would be to disconnect no5 pin from the tvan plug till I sort out something more permanent. cheers everyone.

As I said just pull the appropriate fuse at the rear of car rather than playing around with the wiring in the trailer.

When you put in a brake controller, just connect the brake feed for the trailer brakes to the rear fuse box that has the fuse pulled - easy peasy.

Originally Posted by 101RRS

As I said just pull the appropriate fuse at the rear of car rather than playing around with the wiring in the trailer.

When you put in a brake controller, just connect the brake feed for the trailer brakes to the rear fuse box that has the fuse pulled - easy peasy.

No fuse block on the D4 at the back.

Originally Posted by Tombie

No fuse block on the D4 at the back.

Ok well I assume there is an appropriate fuse on the cabin fuse box or is that line totally unprotected.

Originally Posted by 101RRS

As I said just pull the appropriate fuse at the rear of car rather than playing around with the wiring in the trailer.

When you put in a brake controller, just connect the brake feed for the trailer brakes to the rear fuse box that has the fuse pulled - easy peasy.

See reply number 10 in this current thread.

Originally Posted by shamirj

tested today and plugged the trailer onto the D4 - turned on the lights and viola the tvan brakes locked up, did it a few times just in our driveway and confirmed this is the case. when I turn off the lights the tvan brakes work normally. shanegtr you were on the money mate well done. thanks to all other suggestions as well.

Prob easiest quick fix for now would be to disconnect no5 pin from the tvan plug till I sort out something more permanent. cheers everyone.

Have you read the link that I posted in post number 5 of this current thread?

”In this photo below i have had to find the splice joint in the wiring loom for the park light circuit (all European vehicles run a left & a right park light circuit in there vehicle wiring loom)
It is basically one wire feeding 2 Pin outs. (Pin 7 is our park light circuit & Pin 5 is our supply for our Electric trailer brake varying voltge).
Remove the L/H/R tail light assembly by undoing the 2 phillips head screws & then prising the light gentry from the body with a flat blade & cloth inserted between them so as not to scratch the paint work.
Cut away the black tape on the loom that goes down to the bottom connector, you will come across the splice joint (brown cable with glue coming out on connection-you will notice it starts as a black wire only & after this splice joint it will have a brown & black coming out). The black wire goes to Pin no. 7 & is your park light wire, the brown wire is the other park light wire that we do not need & connect the blue wire to for your trailer brakes. Cut wire as close to splice as possible, tape splice joint up & connect your blue wire to the brown wire that now goes to the plug in the wiring loom.”

There is your solution.

Originally Posted by 101RRS

Ok well I assume there is an appropriate fuse on the cabin fuse box or is that line totally unprotected.

MOSFET

It is illegal to tow a Tvan without a brake controller fitted - and working - in the tow vehicle. The ATM of the Tvan - any variant - is over 750 kg so working trailer brakes on at least one axle are legally required. What the trailer actually weighs when you are towing it is irrelevant, it is the ATM that counts.

If the Tvan has LED lights, you will probably need ballast resistors, too, to make the Disco recognise the trailer.

Cheers
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