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Wire colour code

To wire into car loom for trailer, found the connection need to know what colour wire do what function for the 7 pin trailer plug

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  • Cars & Trucks Master
  • 803 Answers

This should help.wire colour code - trailer26.jpg

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

  • 32 Answers

SOURCE: 1996 Dodge Ram Factory Trailer Wiring Schematic

all you need is a cheap continuity tester, any one to help tap on the brakes..7pin is just like the 4 pin w/extra power wire for acc.lites,electric brakes.when you buy the 7pin rec.,comes w/wiring schematic standard to all trailer rec.- you can do it..kev-mn.

Posted on Dec 10, 2008

co7196
  • 3433 Answers

SOURCE: looking for color code (diagram) - 7 wire trailer harness/wiring

If you haven't purchased the plugs yet. The wire color codes should be included in the package.

  • If you are using used plugs ck the back of the plugs for color or function of wire
  • Wht - ground
  • red - stop
  • blue - accessory/aux
  • brown - tail
  • black - Marker
  • grn - left turn
  • yellow - right turn

Posted on May 06, 2009

  • 7 Answers

SOURCE: Wiring diagram

If you are going from a 4 pin on your trailer to the 7 pin on the truck. You need to go to parts store or a department store (ex Wal Mart) and look in trailer section and find the adapter. Thats what I did. Also Remember if your lights don't work on trailer, check the plug to make sure its tight or check the fuse under your drivers side rear seat for that fuse box.

Posted on May 17, 2009

  • 580 Answers

SOURCE: I need a wiring diagram for a 7 pin trailer board plug

Here's one
08-33-93f1.gif CAV CIRCUIT FUNCTION 1 Z13 12BK GROUND 2 B40 12LB TRAILER ELECTRIC BRAKE OUTPUT 3 L76 12BK/OR TAIL LIGHT (Trailer Tow Relay in PDC) 4 A6 12RD/TN* FUSED B(+) (40A, Always Hot, F8 in PDC) 5 L63 16DG/RD LEFT REAR TURN SIGNAL TRAILER TOW 6 L62 16BR/PK RIGHT REAR TURN SIGNAL CONNECTOR 7 L1 16VT/BK BACK-UP LAMP FIGURE 1: 7-Terminal Trailer Tow Connector

Posted on Jul 10, 2009

  • 3 Answers

SOURCE: Tow bar trailer socket wiring connection point to car wiring?

The connectors for towing wire harnesses on foresters are generally on the passenger side, below the rear taillight inside the cargo space. some require pulling up the foam block that is between the spare tire compartment and the taillight. Check where you replace the tailights from inside the car, if there isn't a matching connector hanging out there, check around the spare tire compartment, see if you can remove the carpeted foam block next to the compartment and find the plug under there.

Posted on Mar 03, 2010

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2005 TOYOTA COROLLA WANT TO WIRE UP THE SEVEN PIN TRAILER PLUG TO MY TOYOTA 2.0 D4D LITRE COROLLA


the secret here is to buy a trailer harness for the vehicle ( available from most tow bar supply and fitting shops )
it is a set that just plugs into the existing harness at the rear light assembly ( piggy back arrangement)
from there you wire the male and female plugs as per the color code that is on the paper that comes with the units
saves cutting into the car harness and causing real electrical problems

Jul 03, 2016 | Toyota Cars & Trucks

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Suzuki alto (2011) 7 pin trailer wiring, wires don't match the colours in the instructions


iam colour blind red/green and i suspect you are too as a lot of males are and most dont even know it ,Anyway simple way out of this is to use one of them electrical 12v test screwdriver or a multimeter like i have to ,never trust colour on wires on a motor vehicle as they use any colour in the looms depending on what been used up and what stock is available ,the assembly line cannot be held up because the colour of the wire is different .

Oct 18, 2013 | Cars & Trucks

1 Answer

I have a 1997 Tahoe 350 4wd. I just need the wiring diagram for the trailer hitch. The wires are there but there is no connectors. I have also found the orange and blue wire for doing the electric...


please dont ask me iam colour blind ,but to overcome this i use a multimeter or a little light and test for current this way ,going by the so called wiring colours is a disaster for me not only the colour thing but the wireing can change colours owing to different suppliers of looms in manufacture ,they run out of one colour and use another ?? you name it i think i have seen it

Aug 22, 2013 | 1998 Chevrolet Tahoe

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Problems with bosal towbar wiring kit....


bosal kits
claim to be plug and play to your vehicle
no wires meant to be cut
the wiring instructions might be generic and not truly specific to your C-Max
save time
wire in indicators old school
pick up the left and right indicator wires at the back of the car
make sure there is a good earth on the 7 pin plug

Mar 07, 2017 | Cars & Trucks

1 Answer

Color of wires


Hi Red, Sorry to tell you this pal, but the Toyota's we have worked on do not have a colour coding format for most of the wiring loom. A cable which is loomed from the speed sensor can be one colour going in and another colour coming out because Toyota join cables of any colour, presumably for cost effectiveness. The cable can be identified from the pin number inside the management computer, or by downloading a pin out diagram from <www.allpinouts.com> Regards John.

Oct 06, 2012 | 1996 Toyota RAV4

1 Answer

I need the wiring colour coding for the rear lights of a 2000 v40d as im fitting towbar electrics


Your post:
Hi There.
here are the 7 cable locations and pin numbers.
Pin 1 Yellow L/H Direction Indicator
Pin 2 Blue Rear Fog Lamps
Pin 3 White Earth Return
Pin 4 Green R/H Direction Indicator
Pin 5 Brown R/H Tail & No, Plate Light
Pin 6 Red Stop Lamps
Pin 7 Black L/H Tail & No, Plate Lights

I found the easiest way to locate the correct wires in the loom is to turn on the lights required and use a circuit tester and splice into the main loom where you have enough wire to play with. Try not to cut the loom as it only causes more problems with bad connections and joins.
Good Luck

Apr 07, 2011 | 2000 Volvo V40

1 Answer

Have plug in towbar electrics for 52plate passet saloon need diagram to wire plug at towball


Hi There.
here are the 7 cable locations and pin numbers.
Pin 1 Yellow L/H Direction Indicator
Pin 2 Blue Rear Fog Lamps
Pin 3 White Earth Return
Pin 4 Green R/H Direction Indicator
Pin 5 Brown R/H Tail & No, Plate Light
Pin 6 Red Stop Lamps
Pin 7 Black L/H Tail & No, Plate Lights

I found the easiest way to locate the correct wires in the loom is to turn on the lights required and use a circuit tester and splice into the main loom where you have enough wire to play with. Try not to cut the loom as it only causes more problems with bad connections and joins.
Good Luck

Jun 02, 2010 | 2002 Volkswagen Passat

1 Answer

Fitting single towbar electrics, Hyundai Coupe 2.0 2004 (Tiburon)


Hi There. Im not sure where you are but this is the sequence for the UK< Hope it helps.
here are the 7 cable locations and pin numbers.
Pin 1 Yellow L/H Direction Indicator
Pin 2 Blue Rear Fog Lamps
Pin 3 White Earth Return
Pin 4 Green R/H Direction Indicator
Pin 5 Brown R/H Tail & No, Plate Light
Pin 6 Red Stop Lamps
Pin 7 Black L/H Tail & No, Plate Lights

I found the easiest way to locate the correct wires in the loom is to turn on the lights required and use a circuit tester and splice into the main loom where you have enough wire to play with. Try not to cut the loom as it only causes more problems with bad connections and joins.(
Good Luck

Apr 16, 2010 | 2003 Hyundai Tiburon

2 Answers

Need to wire tow bar into 1999 LT35


Hi ebrown80
You can splice into each wire in turn at the back of the lamps.No need to cut right through the origional loom completly. For a really good joint you should spot solder each connection and insulate all joints well. Tow bar sockets operate on a common earth, so no need to loop each one.
Check back of socket and you will find each pin has a number. 1---7
The wiring colours from the socket back to the loom are as follows
No 1 Pin--- Yellow Wire---Left Side Flasher
No 2 Pin--- Blue Wire------Fog Lamp.
No 3 Pin--- White Wire--- Earth. Must have good contact or nothing else will operate.
No 4 Pin----Green Wire--- Right Side Flasher.
No 5 Pin----Brown Wire---- Left Side Park Light
No 6 Pin----Red Wire-------Brake Lights
No 7 Pin----Black Wire----Right Side Park Light. Centre Pin.
I hope this helps you out
Best of Luck with it
John


Sep 13, 2009 | 2004 Volkswagen Eurovan

2 Answers

Tow bar trailer socket wiring connection point to car wiring?


The connectors for towing wire harnesses on foresters are generally on the passenger side, below the rear taillight inside the cargo space. some require pulling up the foam block that is between the spare tire compartment and the taillight. Check where you replace the tailights from inside the car, if there isn't a matching connector hanging out there, check around the spare tire compartment, see if you can remove the carpeted foam block next to the compartment and find the plug under there.

Jun 03, 2009 | 2006 Subaru Forester

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