Troubleshooting a Roadmaster 9000 Brake System
Updated 12/22/2025 | Published 10/29/2024
Products Featured in This Question
Question:
I have a roadmaster 9000 brake system on my car. If I pull the breakaway pin, the pump runs but the air gauge stays on zero. Any suggestions on what to check?
asked by: Jeff G
0
Expert Reply:
I would check to see if air is coming out of the bottom of the cylinder on your Roadmaster 9000 brake system. If so you've most likely got a faulty valve and you'll need to use the Replacement Quick Exhaust Valve for Roadmaster BrakeMaster item # RM-450601-50. If there isn't air leaking out of your system and it still functions then it sounds like you just have a bad gauge.
expert reply by:
Jerred H
0
Product Page this Question was Asked From
etrailer Rubber Hitch Cover for 2" Trailer Hitches - Qty 1
- Hitch Covers
- Misc Covers
- Plain
- Rubber
- Fits 2 Inch Hitch
- Standard
- Square
- etrailer
more information >
Continue Researching
- Q&A: Stealth Hitch that Fits 2024 Ford Mustang Mach-E
- Q&A: Why Does the etrailer Trailer Hitch part # e72AR Have a Higher Towing Capacity than the Vehicle?
- Q&A: Best Replacement For Older Dometic Duo Therm 57915.531 Ducted Single Zone AC System With Furnace
- Q&A: Does Roadmaster Invisibrake System Require Installing Diodes too
- Q&A: Replacement Air Conditioner for a Dometic Duo Therm 600315.331
- Q&A: Recommended Replacement AC for a Dometic 57915541
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: What Air Conditioner 13,500 BTU Will Replace My Current Dometic Air Conditioner?
- Article: How to Clean Weld Nuts for the Installation of a Trailer Hitch | etrailer.com
- Article: How to Measure for Trailer Hitch Drop
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Article: 2 Steps for Finding the Right Weight Distribution Hitch Size
- Article: Trailer Wiring Diagrams
- Article: How to Choose the Right Trailer Hitch Class
Jerred H.
12/22/2025
Hey, how did things turn out with your Roadmaster 9000 brake system after checking for air at the bottom of the cylinder? Knowing whether the valve or gauge ended up being the issue could really help others troubleshooting the same problem.