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Urgent: ripped plug off caravan and now lights flash
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JackNorris
 


Member Since: 06 Jul 2012
Location: UK
Posts: 1000

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Fuji WhiteDiscovery 4
Urgent: ripped plug off caravan and now lights flash

Hi all

I was unhitching on site and I got the 13 pin plug caught behind towball and moved car away, end result is 13 pin plug stripped off cables

I remembered I had an old 13-7 pin adapter in the car from old caravan and removed the 13 pin plug from that and fitted to the car.

Now when I plug the caravan into the car the lights flash individually from left side - right side - rear etc

After this it seems to work perfectly

Anyone have any ideas or is this meant to happen and not wired right before?

It’s a 2016 Swift Challenger

Many thanks
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Post #186824713th Oct 2017 8:27 pm
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Brian_DL13
 


Member Since: 25 Aug 2013
Location: Teesdale
Posts: 888

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Not heard of this sort of thing before.

'Van make doesn't matter too much. They're all the same in this respect.

I suspect you have the 13-pin wired wrongly.
  
Post #186824813th Oct 2017 8:32 pm
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JackNorris
 


Member Since: 06 Jul 2012
Location: UK
Posts: 1000

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Fuji WhiteDiscovery 4

Hmm it looked ok so wonder if I've done some damage elsewhere on the run. Will spend some time googling it now.
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Post #186825713th Oct 2017 9:14 pm
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gvw
 


Member Since: 16 Jan 2012
Location: South Yorkshire
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England 2009 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Could you try another trailer or caravan to test?
  
Post #186826513th Oct 2017 9:26 pm
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JackNorris
 


Member Since: 06 Jul 2012
Location: UK
Posts: 1000

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Fuji WhiteDiscovery 4

I am certain its not the car as van wasn't connected at the time Thumbs Up

Just happened to have the plug trapped behind tow ball Censored Censored Censored

EDIT: Does anyone know if Pin 12 is normally connected? I have connected it and wonder if it is some feedback line that wasn't in use before?
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Post #186826713th Oct 2017 9:32 pm
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BBDisco3
 


Member Since: 23 Nov 2008
Location: Cheshire
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United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Indus SilverDiscovery 4

Quick look on Google and pin 12 is not used. Thumbs Up
  
Post #186827213th Oct 2017 9:41 pm
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BBDisco3
 


Member Since: 23 Nov 2008
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Post #186827413th Oct 2017 9:43 pm
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gvw
 


Member Since: 16 Jan 2012
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England 2009 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Here is a reference diagram
  
Post #186827513th Oct 2017 9:43 pm
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gvw
 


Member Since: 16 Jan 2012
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Too slow Laughing
  
Post #186827613th Oct 2017 9:44 pm
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BBDisco3
 


Member Since: 23 Nov 2008
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United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Indus SilverDiscovery 4

And mine's in colour. Laughing
  
Post #186827713th Oct 2017 9:45 pm
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JackNorris
 


Member Since: 06 Jul 2012
Location: UK
Posts: 1000

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Fuji WhiteDiscovery 4

Haha cheers both.

The cable was there so I've wired it as per some diagrams to pin 12 in the plug. Ill disconnect this and retest.

Be interesting to see what the Disco is putting out on that pin and the caravan manual says it isn't connected to anything but I reckon it must be Confused

Edit: Found this online:
Previously allocated to trailer detection in ISO 11446:2002 (the vehicle could detect it was coupled to a trailer using a link between pin 12 and pin 3 in the trailer plug). This function was removed by ISO 11446:2004 and the pin reallocated to reserved. The pin remains reserved for future allocation in ISO 11446-1:2012.

Pin 3 being ground for all road lights. I guess it sends a pulse down the line.
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Post #186828213th Oct 2017 9:53 pm
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Navigator
 


Member Since: 17 Mar 2010
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Having had to fix this sort of damage for folk in the past, replace the cable back to the junction box and have a good look at the box for damage. If you are very lucky the plug comes off the cable first, but the 13-pin one is well held on and can stretch individual cores. Later on in life there is a short in the cable and things really go wrong.
 Always plan ahead - it wasn't raining when Noah started building the Ark.  
Post #186835814th Oct 2017 8:54 am
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JackNorris
 


Member Since: 06 Jul 2012
Location: UK
Posts: 1000

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Fuji WhiteDiscovery 4

Thanks, I’ve had a good look at the box and seems all good, the cable is well anchored under the a frame so think I was lucky there. I also metered every line to check resistance

Removed pin 12 and same issue then removed the Sargent vlm box I have which is used to generate the telltale sign on dash and problem has gone. Wondering if something has shorted as the plug was pulled, maybe the positive from battery or something and shorted the box out?

At least we can get home now Thumbs Up
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Post #186840714th Oct 2017 11:39 am
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Leon
 


Member Since: 26 Apr 2014
Location: Leamington Spa
Posts: 192

England 2005 Discovery 3 TDV6 Base 7 Seat Manual Zambezi SilverDiscovery 3

Are you all sorted?

Give me a shout if you want a hand as it seems we are on the same site.
  
Post #186844814th Oct 2017 2:58 pm
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JackNorris
 


Member Since: 06 Jul 2012
Location: UK
Posts: 1000

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Fuji WhiteDiscovery 4

Cheers Leon.

All sorted enough to get home and then I can troubleshoot further with more tools etc.

Offer appreciated tho Thumbs Up
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MY2015 Discovery 4 SE Tech - SOLD 


Last edited by JackNorris on 14th Oct 2017 9:14 pm. Edited 1 time in total 
Post #186854514th Oct 2017 8:45 pm
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