Autoelectrics tech pages

12N TOWING ELECTRICS 12 volt

Installation of 12N trailer and vehicle wiring. Trailer wiring breakdown callout to local Shropshire areas for 12N trailer and caravan obligatory lighting systems repair.

12N trailer electrics uses a 7 pin plug / socket configuration

Vehicle wiring

We recommend fitment of a 7 way bypass relay when installing 12N towbar electrics to reduce electrical load on vehicle wiring. Late model vehicles may require a vehicle specific wiring kit.

Tow bar wiring of vehicles with CANbus systems

Many modern vehicles have CANbus (Controller Area Network) wiring systems utilising single filament bulbs for combined tail and brake light function by varying the brightness of the bulb, done by powering the lamp with a (pulse width modulated) pulsed signal from a vehicle body control module. The body control module may receive inputs directly from switches and also send/receive serial data from/to other modules on the vehicle computer network. Such vehicles usually have sensitive electronics and will therefore require use of a 7 way bypass relay or manufacturer specific wiring harness when wiring towing electrics. In some instances the vehicle may require reconfiguration of control modules (coding adaptation) to program for towing.

Part No Image
Description
 Pack Qty Nett Price Pounds sterling UK Buy / View Link
   
Accessories and Brackets for Single 12N towing electrics
     
SAAB101  
12N or 12S socket gasket and fixing bolts kit
   1.97  
SAAB102  
12N or 12S socket sealing gasket
  1.03  
SAAB197
Single electrics towing socket mounting bracket
   1.28
   
Trailer Electrical Junction box
    
   
12 N Range ISO1724
      
SAAB103
12 N type Metal 7 pin trailer towing electrics plug ISO 1724 (trailer connector for 12 volt obligatory lighting circuits on cars vans tractors)
 1 2.50 product link
SAAB104
12 N type Metal 7 pin towbar towing electrics socket  ISO 1724 (towbar connector for 12 volt obligatory lighting circuit on cars vans tractors)
 1 3.70
SAAB113
12 N type Black Plastic 7 pin towing electrics Socket ISO1724 (trailer connector for 12 volt obligatory lighting circuits on cars vans tractors)
 1 2.50
 
12 N type Plastic 7 pin towing electrics PlugISO 1724 (trailer connector)
 1    
SAAB132
Single Electrics 12N (ISO 1724) seven pin plastic socket ready wired to 7 core cable and attached to mounting bracket
 1 12.95  
   
12N socket (ISO1724) trailing type used for making up 12N towing electrics extension cable
 1    
SAAB107  
Audible warning unit to signal indicator operation on 12N towbar wiring system.These units are normally wired in to indicator circuit between vehicle wiring loom and towbar wiring loom to provide an audible bllep as trailer indicator operates.
1 5.45  
     Conversion Plugs Leads and Socket      
TATP713  

 12N & 12S 7 pin plugs to 13 pin coupling socket with 0.3 meter cable

 

 1    
     Trailer and Towbar 7 Core Wiring Cable      
           
SARB701

7 Core trailer lighting circuit cable with black sheaf. White cable  9/0.3 +  others 9/0.3

length 30 metres roll

 1 35.01
SARB703
7 Core trailer lighting circuit cable with black sheaf. White cable  28/0.3 +  others 9/0.3

length 10 metres roll

 1 12.62
SARB700

7 Core trailer lighting circuit cable with black sheaf. White cable  28/0.3 +  others 9/0.3

length 30 metres roll

 1 38.14
SARB706

7 Core trailer lighting circuit cable with black sheaf. White cable  28/0.3 +  others 9/0.3

length 100 metres roll

 1 127.20
SARB702

7 Core trailer lighting circuit cable with black sheaf. White cable  28/0.3 +  others 14/0.3

length 30 metres roll

 1 45.14
SARB707

7 Core trailer lighting circuit cable with black sheaf. White cable  28/0.3 +  others 14/0.3

length 100 metres roll

 1 158.22
SARB705

7 Core heavy duty HGV commercial vehicle trailer lighting circuit cable with black sheaf. Commercial vehicle  Semi / Drawbar trailer applications .
White common return cable  35/0.3 +  others 21/0.3

length 30 metres roll

 1 72.91
SAZB130  Spring Steel Chassis Wiring Clip for fast securing of wiring to trailer chassis 50 13.07
   
7 way bypass relay for towing vehicle electrics
      
SAFU016  
Indicator flasher relay featuring "c2" output for trailer indicator warning lamp circuit
 1 6.10
   
12 volt 12N socket tester