Mackman686 Posted 3 hours ago Share Posted 3 hours ago Hi all, I’ve got a problem on my hands. My low air buzzer is going off all the time in my 1990 Mack RB688RST nz model. I’ve replaced and now unplugged the new air pressure switches on the fire wall and the buzzer is still going off. The only way to stop it is by pulling the circuit breaker out or turn the key off. Any help would be much appreciated, photo below of the truck and the buzzer set up. Thanks again Quote Link to comment https://www.bigmacktrucks.com/topic/76547-low-air-buzzer-going-off-all-the-time/ Share on other sites More sharing options...
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