Troubleshooting Test Light Pulsating When Plugged Into Vehicle Side Connector On Truck
Question:
I have to push reallyinch hard on brake pedal to get test light at rear of truck at trailer connection. When I do test light pulsates. Is it suppose to do that? I figure the problem at brake pedal is brake light is not adjusted properly. But still questions in my mind.
asked by: Richard K
Helpful Expert Reply:
It sounds like you are not getting a good connection when you are applying the brakes on your truck which is causing the pulsating light on the test light.
You should not have to press hard on your brake pedal for the tail light or trailer brake functions to work properly.
I recommend checking the red wire from your trailer brake controller to the cold side of your brake pedal switch that only gets power when the brakes are activated, and make sure the connection is secure. If you are still getting a intermittent connection double check that the ground for the trailer brake controller is connected to clean, corrosion free metal.
It also would be a good idea to check the inside of your 7-way connector for corrosion or debris that could be causing a poor connection.
I included a link to a helpful article on wiring for you to take a look at.
Product Page this Question was Asked From
35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 31 Feet and Longer
- Plug and Lead
- 4 Flat
- Optronics
more information >
Continue Researching
- Article: Trailer Wiring Diagrams
- Q&A: Why Does 4-Pin Trailer Wiring Have 5 Wires
- Article: Most Popular Wheel Bearings
- Q&A: Converting 7-Way Blade To 4-Way Flat On Trailer
- Q&A: What Gauge Wire does 4-Way Trailer Wiring Use
- Q&A: How to Tell if 10K Dexter Nev-R-Adjust Electric Trailer Brakes Are for Driver or Passenger Side
- Q&A: Can Trailer Tire Size 175/80-13 Replace Size 185/80R13
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Picking Out Replacement Hub for Nitro Boat Trailer
- Q&A: How Do I Wire My 2022 Chevy Blazer With Tow Package For Trailer Towing
- Article: Trailer Tire Sizing
- Article: Breakaway Kit Installation for Single and Dual Brake Axle Trailers
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)