Let the coach come up to full air pressure and shut it down.
Freightliner m2 low air pressure switch location.
This switch can be tested.
Low pressure normally open opens 6 closes 34.
Release the parking brake.
It is normally open at 0 79 psi and.
If you re stumped here s what i d do fwiw.
Freightliner switches pressure business class cascadia century class columbia coronado fl series and sprinter delivery vans.
Park brake switch low air pressure switch engine ecu throttle pedal bulkhead module.
Control switch discharge air sensor main aux w oe boa91593.
If the driver did a very hard stop the air buzzer would shut off.
Vin read more.
2005 freightliner m2 low air pressure lamp and buzzer stays on all the time found 2 wire plug on amu disconnected replugged and also jumped with no change is there another low pressure switch.
The resolution ended up being to replace the brake drag switch.
The low air buzzer would come on yet still maintain 125 psi.
Even if the tanks are located in one place they are still 2 separate systems.
Customer stated the driver was getting a message on the dash stating park brake air low brakes may drag.
New location is back wall behind driver s seat.
Apply and hold the service brake and watch the air gauge if the air starts dropping you ve got a leak.
There were no fault codes.