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| Re: Air pressure 1976 Palm Beach [message #354993 is a reply to message #354952] |
Fri, 22 May 2020 07:13   |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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I think that light, in your case, is wired to the air pressure start switch. So it will be on any time the comoresser is running or if it fails to start when the air switch is tripped. That switch off and on levels is adjustable. I have mine set at around 90 and 125 PSI.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Air pressure 1976 Palm Beach [message #355031 is a reply to message #355028] |
Fri, 22 May 2020 22:24 |
Rick Staples
Messages: 126
Registered: May 2014
Location: Johnstown, Colorado, USA
Karma: -1
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Senior Member |
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Samuel,
The "Low Air" warning light is entirely separate from the compressor, compressor switch, and "set power level to travel" light and buzzer, at least as GM did it. The "Low Air" light is not all that useful, as the switch controlling it is set rather low. The manual doesn't specify, but I'd guess it's around 50 or 60 psi, which is too low to get my '75 Eleganza up to ride height.
Because of that, it was recommended many years ago (in the GMCMI newsletter IIRC) to wire the light to the compressor circuit as a "compressor running" indicator, and that may have been done to your coach, but it's not original. I saw no need to do this as I can usually hear the compressor when it's running.
If your light stays on after the compressor shuts off, and you have normal 100 - 120 psi pressure, you either have a bad warning light switch (on the tank I think) or a short to ground in the wiring from the warning light to the switch.
HTH,
Rick Staples
Rick Staples, '75 Eleganza, Johnstown, CO
"Advice is a dangerous gift, even from the Wise to the Wise, and all paths may run ill." -Tolkien
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