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Wire Color By Manufacturer

Written by Hitchweb Team
Friday, April 2, 2021 — 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 Generic Wire Color Wire Function Diagram Cars Trucks Wiring

Standard Wire Function
Dual Bulb System
Wire Color
Right Turn & Brake Lights Green
Left Turn & Brake Lights Yellow
Tail Lights Brown
Ground White
Single Purpose System  
Brake Lights Use Converter
Backup Lights Red
Electric Trailer Brakes Connect To Blue Wire From Brake Controller

Ford Wire Function Wire Color Diagram

Standard Wire Function
Dual Purpose Bulb System
Ford Wire Colour
Right Turn & Brake Lights Orange with Blue Stripe
Left Turn & Brake Lights Light Green with Orange Stripe
Tail Lights Brown
Ground Black or Grey
   
Single Purpose System  
Brake Lights Red with Green Stripe
Backup Lights Black with Pink
Electric Trailer Brakes

Connect To Blue Wire From Brake Controller


GMC Wire Function Wire Color Diagram

Wire Function
Dual Purpose Bulb System

GMC Wire Colour
Right Turn & Brake Lights Green
Left Turn & Brake Lights Yellow
Tail Lights Brown
Ground Black
Single Purpose System  
Brake Lights Pink or Light Blue
Backup Lights Light Green
Electric Trailer Brakes Connect To Blue Wire From Brake Controller

Honda Wire Color Wire Function Diagram

Wire Function
Dual Bulb System
Honda Wire Colour
Right Turn & Brake Lights Green with Yellow Stripe
Left Turn & Brake Lights Green with Blue Stripe
Tail Lights Red with Black Stripe
Ground Black
Single Purpose System  
Brake Lights Green with White Stripe
Backup Lights -
Electric Trailer Brakes Connect To Blue Wire From Brake Controller

Jeep Wire Function Wire Color Diagram

Wire Function
Dual Bulb System
Jeep Wire Colour
Right Turn & Brake Lights Brown
Left Turn & Brake Lights Grey with Black Stripe
Tail Lights Blue
Ground Black
Single Purpose System  
Brake Lights Blue with Black Stripe
Backup Lights Brown
Electric Trailer Brakes Connect To Blue Wire From Brake Controller

Mazda Wire Color Wire Function Diagram

Wire Function
Dual Bulb System
Mazda Wire Colour
Right Turn & Brake Lights Green with Yellow Stripe
Left Turn & Brake Lights Black Stripe
Tail Lights Green or Black Stripe
Ground Black
Single Purpose System  
Brake Lights Green or Green with Red Stripe
Backup Lights -
Electric Trailer Brakes Connect To Blue Wire From Brake Controller

Toyota Wire Color Wire Function Diagram

Wire Function
Dual Bulb System
Toyota Wire Colour
Right Turn & Brake Lights Green with Yellow Stripe
Left Turn & Brake Lights Green with Black Stripe
Tail Lights Red with Green Stripe
Ground Black or White
Single Purpose System  
Brake Lights Green with Red or White Stripe
Backup Lights -
Electric Trailer Brakes Connect To Blue Wire From Brake Controller

 

Note** 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. 

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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