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Air Suspension [message #153318]

Sat, 17 December 2011 16:09

Bob M

Messages: 100
Registered: August 2005
Location: Carlisle, PA

Karma: 0

Senior Member

I started the coach today and the rear suspension pump did not work. It has worked fine until today. I noticed there is a 30amp circuit breaker at the top of the fuze box in the glove compartment. It is black and looks like a fuze. How can I tell if its bad and if it's a circuit breaker that opened, how do I close it? Help !!!
Bob Moss
77 Eleganza II

Bob Moss

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Re: Air Suspension [message #153327 is a reply to message #153318]

Sat, 17 December 2011 16:38

Matt Colie

Messages: 8547
Registered: March 2007
Location: S.E. Michigan

Karma: 7

Senior Member

Bob M wrote on Sat, 17 December 2011 17:09

Bob,

You don't say what you have for test gear handy. If it is only a 12V light, that will work. Pick up a ground and then check both ends of the breaker. If it the light lights at both ends, it is something else. You should have EL1 and I know nothing about that, so I will leave you now.

Matt

Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit

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Re: Air Suspension [message #153330 is a reply to message #153318]

Sat, 17 December 2011 16:52

Bob de Kruyff

Messages: 4260
Registered: January 2004
Location: Chandler, AZ

Karma: 1

Senior Member

Bob M wrote on Sat, 17 December 2011 15:09

Bob-my 78 has a different system, but it does have a breaker in the location you describe and it indeed controls the system. I discivered that some times that breaker is making a poor connection and wiggling it around brings it back on line.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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Re: Air Suspension [message #153334 is a reply to message #153330]

Sat, 17 December 2011 17:24

glacierfl

Messages: 444
Registered: June 2011

Karma: 0

Senior Member

Hello,

maybe a silly point, MAKE SURE IT IS 12V.
We don't want your hair standing on end ....

cheers and beers

Steve & Debbie Monticello, FL 77 Palm Beach :- Aurora EX G4WDT

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Re: Air Suspension [message #153336 is a reply to message #153318]

Sat, 17 December 2011 17:52

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma: 3

Senior Member

One day this fall the air compressor refused to work on my 77 Palm Beach.

Turned out to be the connector on the high current relay back by the compressor. A little resistance build up over the past 36 years created enough heat to melt the plastic of the connector.

I cut the connector off and replaced the relay as well with a commonly available today 30Amp "ice cube" relay. $5.00 fix.

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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Re: Air Suspension [message #153340 is a reply to message #153336]

Sat, 17 December 2011 18:21

Bob M

Messages: 100
Registered: August 2005
Location: Carlisle, PA

Karma: 0

Senior Member

Thanks for the suggestions and help. I used my circuit light and sure enough there was no power on one side. I put a 30 amp glass fuze in the fuse box and it worked just fine. No one knew what the circuit breaker was nor did they have any, but the fuze worked. Thanks again.
Bob Moss
Eleganza II

Bob Moss

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Re: [GMCnet] Air Suspension [message #153343 is a reply to message #153340]

Sat, 17 December 2011 18:53

Ken Henderson

Messages: 8726
Registered: March 2004
Location: Americus, GA

Karma: 9

Senior Member

Bob,

The fuse may well prove unreliable. Any good parts store should have the
3AG base circuit breaker to plug right back in that holder.

For example:
http://www.autozone.com/autozone/accessories/Duralast-20-Amp-at-12-VDC-clip-mounted-clip-mounted-circuit-breaker/_/N-2690?counter=7&filterByKeyWor d=3ag+circuit+breaker&fromString=search&itemIdentifier=413282_0_0_

http://goo.gl/KASRw

Ken H.

On Sat, Dec 17, 2011 at 7:21 PM, Bob Moss <fums6@aol.com> wrote:

>
>
> Thanks for the suggestions and help. I used my circuit light and sure
> enough there was no power on one side. I put a 30 amp glass fuze in the
> fuse box and it worked just fine. No one knew what the circuit breaker was
> nor did they have any, but the fuze worked. Thanks again.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach

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Re: [GMCnet] Air Suspension [message #153355 is a reply to message #153343]

Sat, 17 December 2011 19:49

Bob M

Messages: 100
Registered: August 2005
Location: Carlisle, PA

Karma: 0

Senior Member

Thanks for the post on the circuit breaker.

Bob Moss, Eleganza II

Bob Moss

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Re: Air Suspension [message #153430 is a reply to message #153318]

Sun, 18 December 2011 12:45

John Heslinga

Messages: 632
Registered: February 2011
Location: Edmonton, Alberta, Canada

Karma: 4

Senior Member

These breakers are "self resetting circuit breakers". They are often used in circuits that may have temporary higher current loads or occasional sustained high current loads (such as the suspension compressor). Usually one of two types are used in this type of system. Immediate reset, which resets as soon as a problem resolves it self, or switching which needs the system to be turned off before it resets. The compressor can make the wire pretty hot if it has to run for a long time and the circuit breaker will protect the wire (and prevent fires) by shutting down, allowing the circuit to cool before continuing. If you just use a glass fuse, the fuse will "blow" and you will be faced with replacing it to restore the circuit. You may find this to be quite a frustration. While a regular fuse will get you tempoarily on your way safely, replace the breaker with the same kind.

John and Cathie Heslinga 1974 Canyonlands 260 455, Manny tranny and 1 ton, 3:70 LS, Red Seal Journeyman, DTE, BEd. MEd. Edmonton, Alberta

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