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Hi all,

I've done the classic and dragged my 12/13 core cable along the road for some distance. Wires 9,10, 11 and 13 have been broken ...

Looking at the existing cable, there are 13 cables. I can't seem to find a 13 core cable with plug that contains the following wire :

- white with blue stripe

I can find a few on eBay such as : Werbung: https://www.ebay.co.uk/itm/13-Pin-Plug-P...48AAOSwo4pYgSNC

Can anybody help me identify the purpose of the white with blue stripe cable and where I can buy a 13 core cable with plug?

Many thanks
Robin

Hi Randa, Thank you, I did see that.

Upon closer inspection I see from that post :

...Please note that on my van, the unused white/blue wire from pin 12 of the plug had been fitted with a terminal and parked on an unused piece of terminal strip.

Can anyone translate that into (total) idiot terms? Can I simply remove the white/blue wire from the smaller terminal block? I see it in the photo within the referenced thread.

I know that nothing is connected to pin 12 on the towing vehicle as I fitted the kit myself just 4 weeks ago.

I've also got the t-shirt, driving all the way from home to North Yorkshire. Hardly a wire left intact. Green Flag pieced it together temporarily and I then had a new piece fitted from the floor junction box.

A caravan tech advised me that to avoid the problem you only need to put a couple of twists in the cable before fitting it to the car. It actually works too.

Thanks for the advice everyone and sorry I wasn't being very clear. My question was that I can't seem to find a 13 core lead with a plug for sale anywhere.

I can see from the 12 core leads available online, that the white with blue stripe lead is missing.

I'm just concerned that if I buy a 12 core lead without the white with blue stripe cable, that I'll be leaving something important unconnected to the towing vehicle.

Is that clearer?

Sorry, I must be explaining myself terribly. The blue and white stripe wire is connected to something in the junction box. It's connected to the smaller group of connections. I
An additional wit.re then 'bridges' this back to the larger group of connections joining where the white wire goes to from the 13 core cable ....

As the attached PDF shows, it's easy to get confused with 13 pin cable wires as there isn't one definitive colour scheme.

When describing striped wires, the base colour is always written first, and the (thinner) trace colour second, ie, White/Blue describes a white wire with a blue trace.

Common returns (earths):

Pin 3 (always a white wire) is the common return for the running lights - no other returns should be connected to this.

Pins 11 & 13 are common returns for the fridge (pin 10) and charger (pin 9) respectively - these should not be connected together at the caravan, (they are both connected to the towcar's chassis).

Great, thanks for your help everyone.

I'll order a 12 core cable and that should suffice. Thanks again. Maybe I should order two for when I trail the cable on the floor the next time! That would make a total of 3 as expected having previously done it with a trailer.....