How to Access CHMSL Circuit on 2020 Ram 2500 Power Wagon
Updated 04/16/2021 | Published 04/14/2021
Question:
Is the a handy pigtail within the wiring harness on my 2020 Power wagon for my canopy third brake light?
asked by: Roy
Expert Reply:
The circuit you're looking to access is known as the CHMSL (center high mounted stop lamp). I've looked through the forums, and saw several folks mention that there should be a white wire with a purple stripe buried in the harness than runs along the passenger side frame rail. Barring that, the easiest place to access that circuit would be at the 3rd stop lamp atop the back of the cab.
The # 118384 would access the brake lamp circuit for you, but the turn signal is also carried on that circuit so your 3rd brake lamp on your camper shell (which I assume is why you're looking for this circuit) would also flash with the turn signals. If the 3rd brake lamp on your camper shell is NOT an LED, you could use the # 118384, but you'd need to wire a # 118158 into the green and yellow wires from the # 118384 and use the red output wire for your camper shell. The output green and yellow wires wouldn't be needed and could be capped off. If your camper shell 3rd brake lamp is LED, you'd need to use one of the other methods described above.
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: TowSmart 4-Way Flat Trailer Wiring Kit - Vehicle and Trailer Ends
- Search Results: 4 pin adapter
- Search Results: trailer wire adapter
- Search Results: 4 pin trailer plug
- Search Results: trailer wire
- Search Results: tire chains
- Q&A: Connecting 3rd Brake Light in Leer Cap to 2019 Ram 1500
- Q&A: Adding a Second 4-Way Connector for Truck Cap Lights
- Q&A: How To Power Third Brake Light On Camper Using Trailer Connector
- Shop: Rubber Window Edge Weather Strip for RVs - Press In - 12' Long x 1/2" Tall
- Shop: Rubber Window Edge Weather Strip for RVs - Press In - 30' Long x 19/32" Tall
- Shop: 3rd Brake Light Logic Module
- Shop: Tire Chains
- Shop: Glacier Tire Chains w/ Cam Tighteners - Ladder Pattern - V Bar Links - Assisted Tensioning - 1 Pair
- Q&A: Rubber Seal Needed for Window Drip
- Search Results: toilet chemicals
- Search Results: 12v fan
- Q&A: Slam Latch for Camper Baggage Doors That Are 5/8" Thick
- Q&A: Replacement For Lippert Slam Latch 642063 On a 2019 Grand Design Solitude 3740BH-R
- Shop: Bauer Products T-Handle Lock for Truck Caps - Counterclockwise - Matte Black
- Shop: Replacement Printed Circuit Board for MaxxAir Manual Lift RV Roof Vents
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Trailer Wiring Diagrams
- Video: How to Choose a Trailer Brake Controller
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Suspension Enhancement
- Article: How to Measure for Trailer Hitch Drop
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
on Custom Fit Vehicle Wiring
