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Help - Towing Electrics
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zaphod
 


Member Since: 18 Sep 2007
Location: Magrathea
Posts: 357

Scotland 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3
Help - Towing Electrics

To the assembled knowledge of the forum (again) Bow down

Have just bought as nice new Atera Strada bike carrier and hooked it up to the towing electric socket on the back of the Disco. Everything seems fine except for the reversing lights which don't work Question

Have checked fuses and am off to check bulbs. Any ideas guys?

Anyone know which socket pin is meant to control the reversing lights?

Now going armed with multi-meter to try.......
 Sail Fast - Live Slow...

.. / -.- -. --- .-- / .-- .... . .-. . / -- -.-- / - --- .-- . .-.. / .. ... 
 
Post #31455526th Jun 2008 5:39 pm
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wiggs
 


Member Since: 03 Sep 2006
Location: Manchester
Posts: 14372

United Kingdom 2015 Discovery 4 3.0 SDV6 HSE Auto Fuji WhiteDiscovery 4

This may help

http://www.disco3.co.uk/gallery/albums/use...20-pin.doc
 G4 Gone ...but not forgotten  
Post #31466626th Jun 2008 9:03 pm
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zaphod
 


Member Since: 18 Sep 2007
Location: Magrathea
Posts: 357

Scotland 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Wiggs,

Big help Bow down

This means my voltmeter is working and that the car is wired correctly 8)

However, only having towed a few times before, I've never paid much attention to the electrics.

Question, why is there no reversing light output on the 12N connector? Do caravans normally have a plug going to each socket to get around this?

Guess I'll either have to live with no reversing lights or re-wire a work-around, perhaps using 2 plugs into 1 loom...... Confused

Cheers
 Sail Fast - Live Slow...

.. / -.- -. --- .-- / .-- .... . .-. . / -- -.-- / - --- .-- . .-.. / .. ... 
 
Post #31473626th Jun 2008 10:54 pm
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wiggs
 


Member Since: 03 Sep 2006
Location: Manchester
Posts: 14372

United Kingdom 2015 Discovery 4 3.0 SDV6 HSE Auto Fuji WhiteDiscovery 4

zaphod wrote:
Question, why is there no reversing light output on the 12N connector?


Not enough pins on the 12N socket ?

Seriously ..i dont know ..i dont tow ...some one who caravans will be better able to answer the questions hopefully
 G4 Gone ...but not forgotten  
Post #31474526th Jun 2008 11:25 pm
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Bushwanderer
 


Member Since: 27 Nov 2007
Location: Northern Rivers, NSW, Australia
Posts: 2050

Australia 2005 Discovery 3 TDV6 S Manual Buckingham BlueDiscovery 3

Seriously,
In Australia, the black (12N) pins are:
1. Left-hand turn,
2. Reversing signal,
3. Earth return,
4. Right-hand turn,
5. Service (electric trailer) brakes,
6. Stop lamps,
7. Rear, clearance & side-marker lamps.

Therefore, the answer is - reversing lights illumination is available (pin 2). (with thanks to Drivesafe.)
  
Post #31481527th Jun 2008 8:39 am
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al cope
 


Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10352

England 

For the UK, here are the 12N and 12S wiring details:

12N Wiring

Socket
Pin No. 7-core cable colour to Vehicle Circuit
1 Yellow to LH Flasher
2 Blue to Fog Lamp
3 White to Chassis earth
4 Green to RH Flasher
5 Brown to RH tail light
6 Red to Brake Lights
7 Black to LH tail light

12S Kits and Relays

General Instructions for Wiring 12S Socket to Vehicle (12 Volt Negative Earth)

7-core cable colour Connect to Socket terminal No.
Yellow Reversing light and catch 1
Blue Live feed aux battery 2
White Earth 3
Green Live feed interior lights* 4
Brown Sensing Device Spare 5
Red Live feed fridge 6
Black 2nd Earth 7

* On caravans post 1996 this feed is automatically switched during towing by a relay in the caravan to charge the caravan battery. When this happens, other interior circuits are off (except fridge).

hope this helps
Al
 Volvo XC90 B5 Plus Dark
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Post #31482327th Jun 2008 9:03 am
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B16 KJR
 


Member Since: 10 Jul 2006
Location: Rosyth, Fife
Posts: 3005

Scotland 

As al said, unless the trailer/carrier also has the 12s connection then you will not get reversing lights.
  
Post #31484627th Jun 2008 9:47 am
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zaphod
 


Member Since: 18 Sep 2007
Location: Magrathea
Posts: 357

Scotland 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thanks guys,

I'll try to avoid reversing anywhere Laughing

Think I'll see if I can come up with a work-around whilst enjoying Islay's distilleries next week Thumbs Up

Cheers
 Sail Fast - Live Slow...

.. / -.- -. --- .-- / .-- .... . .-. . / -- -.-- / - --- .-- . .-.. / .. ... 
 
Post #31505127th Jun 2008 7:19 pm
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Bushwanderer
 


Member Since: 27 Nov 2007
Location: Northern Rivers, NSW, Australia
Posts: 2050

Australia 2005 Discovery 3 TDV6 S Manual Buckingham BlueDiscovery 3

You lucky Censored !

I haven't sampled the islands produce - apart from Laphraoig (sp?). I love it, but can't afford it. Big Cry Big Cry Big Cry
  
Post #31517428th Jun 2008 2:50 am
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B16 KJR
 


Member Since: 10 Jul 2006
Location: Rosyth, Fife
Posts: 3005

Scotland 

Only way for a work-around is to take a piece of 2 core wire from the trailer board to the cars 12s via a 12s plug. On the board connect one wire to the reversing light live connection, the other to an earth point. At the other end connect the live to pin 1 and the earth to pin 3, plug in the 12s and away you go.
  
Post #31524728th Jun 2008 9:41 am
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TallPaul
 


Member Since: 03 Jan 2008
Location: Near Reading
Posts: 1214

United Kingdom 

Or buy the 13 pin euro plug wiring, but I am sensing its too late for that... Wink
 Disco3 is now gone but not forgotten. Waiting for Disco6 with full aluminium construction weight reduction and hybrid engine...  
Post #31533828th Jun 2008 5:28 pm
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B16 KJR
 


Member Since: 10 Jul 2006
Location: Rosyth, Fife
Posts: 3005

Scotland 

But both the car and trailer board have 7 pin connections. Would be a big (and expensive) job to convert to 13 pin.
  
Post #31574630th Jun 2008 10:02 am
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Bushwanderer
 


Member Since: 27 Nov 2007
Location: Northern Rivers, NSW, Australia
Posts: 2050

Australia 2005 Discovery 3 TDV6 S Manual Buckingham BlueDiscovery 3

Sorry, but don't you have two 7-pin plugs? The black is 12N, while the white is 12S.

Or, once again, am I missing something here. Sad

Best Wishes,
Peter
  
Post #3161081st Jul 2008 5:00 am
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