3rd Brake Light Module Blinking With Turn Signals
Updated 12/11/2023 | Published 12/09/2023
Question:
I have installed the PP20-702 module on a truck topper third brake light on a 2017 F150. The third brake light does not illuminate at all with the turn signals when the brakes are not applied. The third brake light does illuminate properly with brake applications. The problem comes when the brakes and either turn signal is applied, the third light blinks in sync with the turn signal. Does this indicate that the PO20-702 is partially faulty? It seems to be partially working but not fully.
asked by: Eugene G
Expert Reply:
If everything is hooked up correctly, then yes that would indicate that the 3rd Brake Light Logic Module # PP20-702 is faulty since it's supposed to filter out the turn signals which it's not doing. I recommend taking a peek at the wiring diagram attached and verifying that it is hooked up correctly. If it is, then it's faulty and you'll just want to replace the unit.
(click to enlarge)
Product Page this Question was Asked From
Featured Help Information
Instructions
Continue Researching
- Shop: 3rd Brake Light Logic Module
- Video: Complete Breakdown of the 3rd Brake Light Logic Module
- Q&A: Will the Third Brake Light On Camper Shell Blink When Turning.
- Shop: Vehicle Tow Bar Wiring
- Shop: Curt 2-to-3 Tail Light Converter for Towed Vehicles w/ Incandescent Tail Lights
- Q&A: How to Stop a CHMSL From Blinking When Turn Signals Are Applied
- Q&A: Connecting 3rd Brake Light in Leer Cap to 2019 Ram 1500
- Shop: Trailer Wiring
- Shop: 7-Pole and 4-Pole Trailer Connector Sockets w/ Mounting Bracket and Wiring - Vehicle End
- Search Results: hitch receiver lights
- Search Results: receiver hitch light
- Q&A: Troubleshooting Curt 2-Wire to 3-Wire Converter Installation on Trailer
- Q&A: Where Is The Brake Controller Port On A 2025 Ram 1500?
- Q&A: Can Trailer Wiring of 2019 Ram 1500 be Used for Powering Third Brake Light
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Trailer Hitch
- Search Results: trailer hitch
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Search Results: trailer wiring
- Article: Trailer Wiring Diagrams
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Suspension Enhancement
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Article: How to Measure for Trailer Hitch Drop
- Search Results: trailer tires and wheels
- Video: An In-Depth Look at the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Brake Controller
on Accessories and Parts
