Recommended Wiring Harness to Bypass Factory Trailer Wiring on 2003 Dodge Ram 2500
Updated 01/21/2019 | Published 01/18/2019
Products Featured in This Question
Question:
Hi I have a 2003 dodge 2500 with the 5.9 Cummins and as everyone know they had a ridiculous idea for their trailer lights my issue is my right turn signal and brake light doesn’t work on any trailer we own but works on the truck I’ve traced it all the way back to the fuse box and have no power I’m assuming it’s the relay buried inside the fuse box they want $400-$700 for a new fuse box with the chance of it happening again down the road that being said I’m wondering if their is a way to bypass it completely and yet cheaper and not have to deal with it anymore
asked by: Trevor
Expert Reply:
To bypass the factory trailer wiring on your 2003 Dodge Ram (which is indeed known for some fun issues) I recommend using the Curt T-Connector Vehicle Wiring Harness # C55504. This harness will plug into ports behind your truck's tail lights to provide you with a new 4-Way connector that doesn't go through the factory trailer wiring circuits.
If you are currently using a 4-Way to connect with your trailer then this is all you need. If you have a 7-Way then you can just add the Hopkins Adapter # 37185. This will plug right into the mentioned 4-Way to give you a 7-Way connector at the other end. If you only need to power your trailer's signal lights then the additional wire leads (other than the white ground wire) can just be tied off.
If you need a fully functional 7-Way (your trailer has electric brakes or you use the connector to charge a trailer battery) then I instead recommend using the Universal Wiring Kit # ETBC7 to upgrade the new 4-Way to a 7-Way. This kit includes everything needed to do this.
I have attached a couple video reviews and the written installation instructions for these products that you can check out as well.
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Q&A: Looking For 5th Wheel/Gooseneck Wiring Harness For 2018 GMC Sierra 2500 With 6-1/2' Bed
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Truck Bed Auxiliary Tank
- Search Results: weld~on trailer jack
- Search Results: trailer jack
- Shop: etrailer Square Sidewind Trailer Jack - Foot Release Drop Leg - 13-1/2" Lift - 12,000 lbs
- Shop: Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector - 7' Long
- Shop: Square Direct Weld Trailer Jack - Drop Leg w/ Spring - Sidewind - 15" Lift - 12,000 lbs
- Shop: Square Direct Weld Trailer Jack - Drop Leg w/ Spring - Sidewind - 15" Lift - 12,000 lbs
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Trailer Hitch
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class V Commercial Duty - 2-1/2"
- Shop: Nerf Bars - Running Boards
- Q&A: Replacement Option For Binkley Model 48000-SL From 1985
- Q&A: 7-Way Recommendation for 2006 Dodge Ram 3500 to Bypass TIPM
- Video: Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C55504 Review
- Video: In-Depth Review of the Universal Installation Kit for Trailer Brake Controller
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Diagnosing 2003 Dodge Ram 2500 7-Way not Functioning Trailer Lights
- Shop: Brake Controller
- Search Results: brake box
- Q&A: Installing a 7-Way Trailer Connector on a 2003 Dodge Ram 1500 with 4-Way Trailer Connector
- Q&A: Installing a 7-Way Trailer Connector on a 2003 Dodge Ram 1500 With 4-Way Wiring Harness
- Search Results: 37185
- Video: Set up: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector on a 1999 Dodge Ram Pickup
- Video: Feature Breakdown: Universal Installation Kit for Trailer Brake Controller
- Article: Trailer Wiring Diagrams
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
on Custom Fit Vehicle Wiring
