Locating the Brake Light Wire to Install a Trailer Wiring Harness on a 1991 Isuzu Trooper
Question:
Got everything working great except the brake. I have tried connecting the red wire just about every wire I could. Where does it need to go for this application? This is the 4 way plug.
asked by: Rich B
Expert Reply:
The easiest way to determine which wire is the brake light wire on your 1991 Isuzu Trooper is to first identify the brake light bulb. Then test the wires going to that bulb with a circuit tester, such as # PTW2993 if you need one, while someone sits in the cab and steps on the brakes (to power that circuit).
Another option is if the Trooper has a third, center brake light, to test those wires and tap into the brake wire there instead of at the tail lights.
Products Referenced in This Question
Product Page this Question was Asked From
Curt Tail Light Converter with 4-Way Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Universal Fit
- 4 Flat
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Wiring Diagrams
- Q&A: Recommended Base Plate Kit for a 2023 Jeep Gladiator Rubicon
- Article: My Trailer Hitch Doesn't Fit
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Article: How to Choose the Right Trailer Hitch Class
- Article: How to Measure for Trailer Hitch Drop
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: Converting From 7-Way Round to 7-Way Flat Connector
- Q&A: Grounding T-Connector for 1995 Jeep Grand Cherokee
- Q&A: Recommended Replacement Seal For A Tri Tec T-23972 Seal
- Q&A: Install Procedure for EcoHitch 306-X7235 Hitch on 2013 Honda Civic
- Q&A: Where Does A Trailer Wiring Harness Plug In On A 2020 Subaru Crosstrek