the rocker switch inside the cab used to chime when the air was dumped. the chime stopped and the air isn't dumping. the trailer shop checked the valve on the trailer and it works. the fuses are good, the rocker switch lights up, but again no chime and no dumping of air. is there a relay somewhere in the dash that could be bad or is the chime the relay causing the issue. anyone have a similar problem in the past?
379 trailer dump valve
Discussion in 'Peterbilt Forum' started by buckfarmer, Jul 10, 2016.
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