Trailer Left Side Lights Not Working with Trailer Wiring C56375 Installed in 2018 Chevy Equinox
Updated 10/21/2021 | Published 05/19/2018
Question:
I bought this wiring kit for my 2018 Chevy equinox and I plugged it but the left light wont work at all. Whether I am using the breaks, left turn signal or the running lights are on. I used a tester I purchased from this site and it appears to be working with the tester. I have been using a magnetic light set on my trailer but I have tried two different brand new sets so I am stumped.
asked by: Fletcher J
Expert Reply:
It sounds like there is a problem with a relay on the vehicle side. In the fuse panel located in the rear of your 2018 Chevy Equinox check to make sure there is a relay in the K3 location. Wiring harness # C56375 comes with 2 relays and one of them goes in that K3 location. It is for the left side trailer brake light and turn signal.
It is a good idea to check any and all fuses/relays related to the tow package wiring. Under the hood that would be location F28. In the cab check location F03. And in that rear panel check F3, F8, F13, F14, F18, K1, K2, K3, and K4.
Since everything else is working it has got to be one of those.
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Trailer Wiring
- Search Results: trailer hitch wiring
- Search Results: trailer wiring
- Search Results: luma leds trailer lights
- Search Results: trailer lights
- Shop: T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Shop: Trailer Hitch
- Shop: Optronics Fleet LED Trailer Tail Lights w/ Grommets - Stop,Turn,Tail - Submersible - Oval - Qty 2
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Video: Complete Breakdown of the Standard Trailer Light Kit with 25' Wire Harness
- Video: Comprehensive Review: Miro-Flex LED Clearance or Side Marker Light w/ Reflector
- Video: Complete Breakdown of the LED Combination Tail Light Kit for Trailers under 80" Wide
- Video: Let’s Check Out the 3-Wire Pigtail for Optronics Trailer Lights
- Video: 3-Wire Pigtail for Optronics Trailer Lights: The Breakdown
- Shop: LED Combination Tail Light Kit for Trailers under 80" Wide - Submersible - Driver and Passenger
- Shop: Standard Trailer Light Kit with 25' Wire Harness
- Shop: 3-Wire Pigtail for Optronics Trailer Lights - 3-Prong PL-3 Plug - 10" Lead
- Video: Curt Powered Tail Light Converter Installation - 2023 Kia Telluride
- Q&A: Are Relays Needed When Installing Curt Wiring Harness for 2018 Chevy Equinox with Tow Package
- Video: Install: T-One Vehicle Wiring Harness for Factory Tow Package on a 2020 Chevrolet Equinox
- Search Results: 4 pole mount
- Q&A: Diagnosing, Locating and Repairing Trailer Ground Problem
- Q&A: Troubleshooting Trailer Left Turn Signal Not Working on 2019 Chevy Equinox
- Q&A: Looking for Class II Hitch for 2025 Toyota Sieanna XLE
- Q&A: Will Cats, Dogs, Horses, and Chickens be Affected by MouseBlocker 1000x Electronic Rodent Deterrent
- Q&A: 4 Pin Wiring Harness for 2025 Chevrolet Equinox
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: Wiring Harness Options For 2019 Chevy Equinox LT 1.5 AWD
- Article: Tow Bar Wiring Overview
on Custom Fit Vehicle Wiring
Bob M.
6/3/2020
Did anyone find a solution for this left side issue? My sister is having the exact same problem on her 18 Equinox, and the dealership has tested it but the trailer works on 3 other vehicles FYI there is a spot for the 2 relays BUT there is no wiring be hide it. I'm a Tech and stumped here