Low Air Pressure Switch location.

[Matt Colie]

The low air pressure light in out coach has never worked. I was hoping to diagnose the issue, but I can't locate the switch. The bulb checks as
good.

Any hints where to look? I can't find an empty air connection or a pair of wires matching the colors....

Thanks

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Still Loving OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[terry1]

Mine is under the compressor mounted to the radiator support. It's the same switch the compressor uses.
--
Terry Kelpien

ASE Master Technician

73 Glacier 260

Smithfield, Va.

 

[johnny]

Mine powers the light off the compressor feed... it's treally a 'compressor running' light.

--johnny
--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"The road goes on forever, and the party never ends" --Robert Earl Keen

 

[bob heller]

On my 1974 GMC 26ft the low air light switch is on the air tank, under the battery tray.
--
Bob Heller
1974 X-Canyonlands 26ft
Original 455 exc for timing chain,
Rockwell intake, valve covers. 141k miles.
Winter Springs FL

 

[Ken B]

Mine does not even have a light bulb in it but I "think" it is simply a light to indicate when the compressor is running. I also think It is wired to
the air pressure switch switch that turns on the compressor.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

 

[Keith V]

my heavily modified 76 Royale has a low pressure switch on the side of the tank which is on the front right under the driver. This is separate from the compressor switch thats on the front of the tank

________________________________
From: Gmclist on behalf of Ken Burton
Sent: Thursday, February 16, 2017 6:33:10 PM
To: gmclist
Subject: Re: [GMCnet] Low Air Pressure Switch location.

Mine does not even have a light bulb in it but I "think" it is simply a light to indicate when the compressor is running. I also think It is wired to
the air pressure switch switch that turns on the compressor.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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[john shutzbaugh]

Don't know about 23' 73s, but in GMC fitted ElectroLevel coaches, there was generally no wire run to the low air light. Many of us used the extra
contacts on the Pressure switch and ran a wire to the light cluster to let us know if the compressor was running. My 77 Eleganza as delivered had no
wire to the switch but had a bulb in the telltale cluster.
--
John Shutzbaugh, Vacaville, CA;
77 Eleganza, bought it new, can't blame PO, and
78 Buskirk stretch, "What were we thinking?"