It sounds like there may be an issue with the wiring, either a bad ground, broken wire or corroded trailer connector.
Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.
The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if... view full answer...
I called the manufacturer to verify and yes, Roadmaster Universal Brake Monitor, # RM-9530 is on a loop. So what you did to move forward from 30 to 60, then to 90 and then 120, move forward once more to return to 30 second setting.
From the manual:
"The “Status” light is flashing bright red; the “Brake” light is flashing yellow; accompanied with an audible alarm.
The towed vehicle’s brakes have been on continuously for 30 seconds (for example, at a long stop light). Pump the motorhome... view full answer...
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