Trailer Wiring Problem

Foxy_Jr · Aug 1, 2019

I use the truck to tow my caravan and a car transporter. Caravan being 13pin and I use an adaptor for the car trailer 7 pin connector.
Just returned from a euro trip with the car trailer and had some issues with the trailer tail lights, swapped the bulbs to no avail then checked the o/p direct from the socket and it seems the RHS tail circuit from the truck is dead. It's also dead direct from the 13 pin.
I can't find and details on any fuses etc for this circuit can anyone here help diagnose?

TIA!:cheers2:

Foxy_Jr · Aug 1, 2019

Sorry, I should have added that ist a 2016 model, with the full OEM electrics!

freemansteve · Aug 1, 2019

New as it is, it could still be corroded earth straps on the truck or trailer, or corrosion in the connectors.
Start by using a multimeter and checking every signal in the connector, (trailer disconnected) to see if it's truck or trailer (it could still be either, but still worth doing)....

Foxy_Jr · Aug 1, 2019

Thanks for the reply!
All other signals are fine as is the earth, seems it may be the module which I believe is CAN-bus? Apparently it doesn’t have any fuses and may just have expired! Thanks for that Nissan!

Strangely enough it seems to have started working again - for now!

Will check all the connections to the battery etc but the module seems to be wired directly and not a chassis earth.

Sent from my iPhone using Tapatalk

freemansteve · Aug 1, 2019

Trailer wiring is not CANbus though - it is simple battery/bulb stuff...
Oddly enough, CANbus signalling would likely be the last thing to fail if there was poor connectivity....

gfromleeds · Aug 2, 2019

Check the internal connectors in the back of the socket!
Even though its fairly new it could still have a loose/corroded connection

Trailer Wiring Problem

Foxy_Jr

Foxy_Jr

freemansteve

Foxy_Jr

freemansteve

gfromleeds

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