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Electro level II [message #283190] Sun, 26 July 2015 09:54 Go to next message
Smitty52 is currently offline  Smitty52   United States
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Registered: July 2007
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Senior Member
For someone who is intimidated by a wiring diagram is there an easy to understand troubleshooting/test to dtermine why the right side won't air up? Somewhere in the system I believe the solenoid is not kicking in. I am looking through my binders of info to see if I have anything to work from in the manuals but am wondering if there is an "Electro level for dummies" post out there somewhere. I have sold the coach and want to get it all set for the new owner and now it decides not to air up. Compressor is at 90lbs and the left side is fine. Thanks

Wayne and Lisa,
Bolton Landing, NY,
Patriot Guard Rider,
Standing for those who stood for us.
Re: [GMCnet] Electro level II [message #283196 is a reply to message #283190] Sun, 26 July 2015 10:18 Go to previous messageGo to next message
bdub is currently offline  bdub   United States
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Registered: February 2004
Location: Central Texas
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Senior Member

http://gmcws.org/Tech/dsimmons/air_suspension/air-suspension-system.html

http://www.gmcmi.com/wp-content/uploads/2014/05/ElectroLevel-II-Presentation.pdf

http://www.bdub.net/wirediagrams/78-chassis-electrolevel-II.pdf



On Sun, Jul 26, 2015 at 9:54 AM, Wayne E LaMothe
wrote:

> For someone who is intimidated by a wiring diagram is there an easy to
> understand troubleshooting/test to dtermine why the right side won't air up?
> Somewhere in the system I believe the solenoid is not kicking in. I am
> looking through my binders of info to see if I have anything to work from in
> the manuals but am wondering if there is an "Electro level for dummies"
> post out there somewhere. I have sold the coach and want to get it all set
> for
> the new owner and now it decides not to air up. Compressor is at 90lbs
> and the left side is fine. Thanks
>
>
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bdub
'76 Palm Beach/Central Texas
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Re: Electro level II [message #283265 is a reply to message #283190] Mon, 27 July 2015 09:27 Go to previous messageGo to next message
JohnL455 is currently offline  JohnL455   United States
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Registered: October 2006
Location: Woodstock, IL
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Does the manual raise switch do anything? If it does then your right compressor is good. Might be height sensor on that side. EL II is simpler than the EL I I have but the sensors can be an issue I have heard.

John Lebetski
Woodstock, IL
77 Eleganza II
Re: Electro level II [message #283292 is a reply to message #283265] Mon, 27 July 2015 12:45 Go to previous messageGo to next message
Smitty52 is currently offline  Smitty52   United States
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Registered: July 2007
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It appears that even though it is a 78 it has the electro level I system. The right side switch goes to a ground when pressed. If I knew which solenoid it went to I would unplug it and see if it still grounds out. Then it would be the switch or wire issue. If it does not ground out then I would think it is an issue with the solenoid.

http://img.photobucket.com/albums/v105/Superglider/GMC%20Motorhome/P1014658.jpg

http://img.photobucket.com/albums/v105/Superglider/GMC%20Motorhome/P1014654.jpg


Wayne and Lisa,
Bolton Landing, NY,
Patriot Guard Rider,
Standing for those who stood for us.
Re: [GMCnet] Electro level II [message #283301 is a reply to message #283292] Mon, 27 July 2015 14:53 Go to previous messageGo to next message
Ken Henderson is currently offline  Ken Henderson   United States
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Registered: March 2004
Location: Americus, GA
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Senior Member
Wayne,

If you check the wiring diagram, you should find that the Raise solenoid is
powered through a Light Blue with Double Black Stripe wire. However,
there's also the Hold (Raise/Lower) solenoid to be concerned about: It's
powered, during either Raise or Lower, through a Pink with Double Black
Stripe wire. If Lower works OK, the Hold solenoid should be OK.

You can also test the solenoids by disconnecting the listed wires and
applying 12 VDC directly to the solenoid, but without the Hold solenoid
activated at the same time, no air should flow.

HTH,

Ken H.


On Mon, Jul 27, 2015 at 1:45 PM, Wayne E LaMothe
wrote:

> It appears that even though it is a 78 it has the electro level I system.
> The right side switch goes to a ground when pressed. If I knew which
> solenoid it went to I would unplug it and see if it still grounds out.
> Then it would be the switch or wire issue. If it does not ground out then I
> would think it is an issue with the solenoid.
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
Re: [GMCnet] Electro level II [message #283303 is a reply to message #283292] Mon, 27 July 2015 14:58 Go to previous messageGo to next message
powerjon is currently offline  powerjon   United States
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Registered: January 2004
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Senior Member
Wayne,
I am reposting the manual so other can take advantage of it information. The solenoid layout and wiring are all in the document.

http://www.bdub.net/manuals/Electro-Level.pdf

JR Wright
GMC Great Laker MHC
GMC Eastern States
GMCGL Tech Editor
GMCMHI
78 GMC Buskirk 30’ Stretch
1975 GMC Avion (Under Reconstruction)
Michigan

> On Jul 27, 2015, at 1:45 PM, Wayne E LaMothe wrote:
>
> It appears that even though it is a 78 it has the electro level I system. The right side switch goes to a ground when pressed. If I knew which
> solenoid it went to I would unplug it and see if it still grounds out. Then it would be the switch or wire issue. If it does not ground out then I
> would think it is an issue with the solenoid.
>
>
>
>
>
> --
> Wayne and Lisa,
> Bolton Landing, NY,
>
> Big Blue Bus AKA Triple B, 78 Royale center kitchen,
>
> Patriot Guard Rider,
> Standing for those who stood for us.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
Re: [GMCnet] Electro level II [message #283304 is a reply to message #283292] Mon, 27 July 2015 15:08 Go to previous messageGo to next message
emerystora is currently offline  emerystora   United States
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Registered: January 2004
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Senior Member
Wayne

It is common for the swithes to accumulate dirt inside which stops them from making contact.
It is easy to open the switch to clean out the dirt and lint.
Use some spray contact cleaner to clean and lubricate them when reassembling them.

I have cleaned mine and some other GMCer’s motorhomes to solve problems.

Emery Stora
77 Kingsley
Frederick, CO

> On Jul 27, 2015, at 11:45 AM, Wayne E LaMothe wrote:
>
> It appears that even though it is a 78 it has the electro level I system. The right side switch goes to a ground when pressed. If I knew which
> solenoid it went to I would unplug it and see if it still grounds out. Then it would be the switch or wire issue. If it does not ground out then I
> would think it is an issue with the solenoid.
>
>
>
>
>
> --
> Wayne and Lisa,
> Bolton Landing, NY,
>
> Big Blue Bus AKA Triple B, 78 Royale center kitchen,
>
> Patriot Guard Rider,
> Standing for those who stood for us.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


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Re: Electro level II [message #283564 is a reply to message #283190] Thu, 30 July 2015 19:04 Go to previous message
JohnL455 is currently offline  JohnL455   United States
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
Senior Member
I'm with Emery on this one. Use a jewelers driver to open the switch and don't loose spring and follower. They have real contact points inside that get coated with the broken down protectve foam dust sheet that has long degraded to goo. Some dielectric grease keeps it working smoothly. This fixed my no down on passenger side. Check continuity with Ohm meter before reinstalling. I think they are DPDT.

John Lebetski
Woodstock, IL
77 Eleganza II
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