The manual on/off switch is the ignition key. The pressure switch is what
turns the compressor off when the pressure in the tank reaches the cut off
point. There must be a big air leak in the system.
Jim Hupy
Salem, Or
78 GMC ROYALE 403.
On Apr 27, 2017 4:57 PM, "Bob Dunahugh" wrote:
> I know absolutely NOTHING about the 1973 air ride system. So I know I'm
> LOST. Then with parts missing. There is a pressure shut off switch. Were is
> the manual off switch. The right side controls are not there. This part of
> this GMC is a mess. Bob Dunahugh
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