Wire Color By Manufacturer

Written by hitchweb Team
Wednesday, December 21, 2011 — 6 Comments

Over the years manufacturers have changed the wire colors on vehicles. The below diagrams show what vehicle manufacturer has as each wire function:

Standard Wire Function
Dual Bulb System
Wire Color
Right Turn & Brake LightsGreen
Left Turn & Brake LightsYellow
Tail LightsBrown
GroundWhite
Single Purpose System 
Brake LightsUse Converter
Backup LightsRed
Electric Trailer BrakesConnect To Blue Wire From Brake Controller

Standard Wire Function
Dual Purpose Bulb System
Ford
Right Turn & Brake LightsOrange with Blue Stripe
Left Turn & Brake LightsLight Green with Orange Stripe
Tail LightsBrown
GroundBlack or Grey
  
Single Purpose System 
Brake LightsRed with Green Stripe
Backup LightsBlack with Pink
Electric Trailer Brakes

Connect To Blue Wire From Brake Controller


Wire Function
Dual Purpose Bulb System

GMC
Right Turn & Brake LightsGreen
Left Turn & Brake LightsYellow
Tail LightsBrown
GroundBlack
Single Purpose System
 
Brake LightsPink or Light Blue
Backup LightsLight Green
Electric Trailer BrakesConnect To Blue Wire From Brake Controller

Wire FunctionHonda
Dual Function Bulb System 
Right Turn & Brake LightsGreen with Yellow Stripe
Left Turn & Brake LightsGreen with Blue Stripe
Tail LightsRed with Black Stripe
GroundBlack
Single Purpose System 
Brake LightsGreen with White Stripe
Backup Lights-
Electric Trailer BrakesConnect To Blue Wire From Brake Controller

Wire FunctionJeep
Dual Function Bulb System 
Right Turn & Brake LightsBrown
Left Turn & Brake LightsGrey with Black Stripe
Tail LightsBlue
GroundBlack
Single Purpose System 
Brake LightsBlue with Black Stripe
Backup LightsBrown
Electric Trailer BrakesConnect To Blue Wire From Brake Controller

Wire FunctionMazda
Dual Function Bulb System 
Right Turn & Brake LightsGreen with Yellow Stripe
Left Turn & Brake LightsBlack Stripe
Tail LightsGreen or Black Stripe
GroundBlack
Single Purpose System 
Brake LightsGreen or Green with Red Stripe
Backup Lights-
Electric Trailer BrakesConnect To Blue Wire From Brake Controller

 


Wire FunctionToyota
Dual Function Bulb System 
Right Turn & Brake LightsGreen with Yellow Stripe
Left Turn & Brake LightsGreen with Black Stripe
Tail LightsRed with Green Stripe
GroundBlack or White
Single Purpose System 
Brake LightsGreen with Red or White Stripe
Backup Lights-
Electric Trailer BrakesConnect To Blue Wire From Brake Controller

It is recommended that a circuit tester be used on the tow vehicle's wiring harness to verify that the correct wire has been located for the proper function. Please contact our Team via live chat, email, or call 800-300-4067 if you have any questions.

Posted in Towing 101

Comments


Hitchweb Team
Wednesday, February 14, 2018
Hello there - I checked with CURT Manufacturing to see if they could help figure this out, but they are confused as well. It might be best if you contacted them direct, and photos will definitely help! You can call them toll free at 1-800-798-0813. Thank you! Hitchweb Team
paul
Friday, February 9, 2018
hi if anyone could help with this!!! blue with orange stripe 2013 ford explorer its in the left front engine compartment impact sensor and horn splits off from the same bundle run
Hitchweb Team
Friday, April 7, 2017
Hi Butch, Sorry we've tried all our tech contacts and looked through wiring schematics but we unfortunately can't pin down what this wire is for. We recommend calling Ford directly and hopefully they can help you out! Sorry we couldn't be more help on this one, but if we can look into anything us please contact us at info@hitchweb.com Thank you, Hitchweb Team
Butch blanchard
Friday, April 7, 2017
On my 2009 f-350 dump I put on a new tail light. It has 3 wires out of tail but 4 on the truck. I can't figure where the black with white stripe goes
Hitchweb Team
Tuesday, March 14, 2017
Hi there - we'd be happy to look into this further for you! Would you please let us know the make/model of your vehicle so we can follow up with an electrical tech? You can reply here or send the info to info@hitchweb.com Thank you! Hitchweb Team
Anonymous
Tuesday, March 14, 2017
I have a brown wit white stripe and grey wit black stripe and black and grey stripe in the in dash what do they mean
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