Electric Trailer Brake Controller Not Displaying Number When Brake Pedal Applied
Updated 04/19/2017 | Published 04/18/2017
Question:
2011 Isuzu npr heavy duty Trailer breaks are working, but when I press break pedal on truck the break controller doesnt display the number of force applied.
asked by: Clint
Expert Reply:
The most probable cause for not getting a display when you apply the truck brake, but getting a display when manually activate the override is a bad connection in the stop light circuit. The stop light circuit is the red wire coming off the brake controller that goes to the cold side of your brake pedal switch. It may still be working on the trailer in part because the inertia sensor may still be working in the brake controller.
I recommend using a circuit tester like # PTW2993 to check the stop light circuit for function when the pedal is pressed.
Product Page this Question was Asked From
Continue Researching
- Shop: Hydrastar Electric Over Hydraulic Actuator for Disc Brakes - 1,600 psi
- Shop: Fulton Fold-Away Coupler Hinge Kit for 3" x 5" Tongue - Bolt On - Up to 9,000 lbs
- Shop: Hydrastar Electric Over Hydraulic Actuator Kit for Disc Brakes - 1,600 psi
- Search Results: coupons
- Shop: Demco Channel Tongue Trailer Coupler - eZ-Latch - Silver - 2" Ball - Bolt On - 10,000 lbs
- Search Results: straight tongue trailer coupler
- Q&A: Troubleshooting Reese Pilot Brake Controller Showing No Numbers
- Q&A: Troubleshooting Brake Controller Not Working When Brakes Are Applied but Works With Override Switch
- Q&A: How do I Tell if the Brake Controller is Bad
- Q&A: Primus Brake Controller Side Lever Adjustment and Light Staying On All of the Time
- Shop: Brake Controller
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Q&A: How to Test Brake Controller without Trailer Connected
- Q&A: How to Hook Light Bar Up to Work with High Beams on Vehicle