Demco SBS Air Force One Replacement Parts for Poor Vacuum on 2018 Jeep JK Rubicon
Updated 08/25/2020 | Published 08/22/2020 >
Products Featured in This Question
Question:
My Jeep Wrangler Rubicon is a 2018 jk model. It gives me traction control warning light about 50 per cent of the time I drive it The local Jeep dealer found the diagnostic fault analysis to indicate low vacuum pump data. They believe that that was a leak in the Air Force One control box. They disconnected the vacuum line and capped the tee in the Jeep vacuum line. Is there any more checks of the AF1 control box that I can perform? Can you supply a replacement if needed?
asked by: Peter B
Expert Reply:
The Demco SBS Air Pressure Stop Light Switch Kit for Towed Vehicles - Air Force One # SM99629 will have that fitting you are referencing. You will also want to check any fittings like the Replacement 1/4" Female Pushlock Fitting for Demco SBS Supplemental Braking Systems - Qty 1 # SM99611 or check valves # SM99909.
If the controller is the issue then you will need the Demco SBS Second Vehicle Kit for Air Force One Supplemental Braking System # SM99209. The controller is not available separately.
Product Page this Question was Asked From
Demco Air Force One Flat Tow Brake System for RVs w/ Air Brakes - Proportional
- Flat Tow Brake System
- Brake Systems
- Proportional System
- One-Time Setup
- Vehicle Battery
- Fixed System
- Power Assist Brake Compatible
- Air Brakes
- Indicator Lights
- Demco
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Search Results: base plate for tow bar
- Search Results: rvi towed battery charger
- Search Results: wiring accessories and parts
- Search Results: air force one reinstall kit
- Search Results: blue ox base plate
- Shop: Trailer Wiring
- Shop: Vehicle Tow Bar Wiring
- Search Results: blue ox flat tow wiring harness
- Shop: Base Plate for Tow Bar
- Search Results: blue ox base plates
- Shop: Blue Ox 6-Pole, Round Pin, Trailer Wiring Socket - Vehicle End
- Shop: Curt RVibrake Towed Battery Charger+ for Flat Towing
- Video: Review of the Firestone Fuse Circuit Tap Kit
- Shop: Front Mount Hitch
- Shop: Vehicle Tow Bar Brake System
- Shop: Blue Ox Accessory Kit for Ascent and Avail Tow Bars - Tail Light Wiring - 7-Way to 6-Way Cable
- Shop: Curt Tow Bar 7-Way to 6-Way Coiled Adapter Cord w/ 6-Way Socket - 7' Long
- Shop: Replacement Car-Side Pushlock Connector for Demco Air Force One Air Jumper
- Shop: Towed Vehicle Reinstall Kit for Demco Air Force One Flat Tow Brake System
- Shop: Roadmaster Battery Charge Line Kit for Towed Vehicles
- Q&A: Recommended Flat Tow Parts for a 2025 Jeep Wrangler Sport Towed By A Tiffin RV w/ Quick Connect Air
- Q&A: Easiest Setup For Flat Towing a 2024 Ford Maverick With Demco Commander Tow Bar and Brake Buddy
- Q&A: Demco Air Force One Braking System For Factory Prepped Tiffin RV
- Q&A: Parts Needed to Flat Tow 2025 Ford Bronco Badlands
- Article: Trailer Wiring Diagrams
- Q&A: Does the Curt Base Plate Kit Work w/ the Ford Modular Bumper on a 2025 Ford Bronco Everglade?
- Q&A: Parts Needed to Flat Tow 2006 Dodge Ram 1500 4WD
- Article: Best Vehicles to Flat Tow Behind an RV
- Article: Must-Have Flat Towing Components
- Q&A: Correct Flat Tow Wiring for 2026 Jeep Wrangler Rubicon With ParkSense



