| Trouble with Electro Level I [message #100677] |
Wed, 22 September 2010 14:43  |
Jon payne
Messages: 495
Registered: May 2008
Karma: 1
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Guys,
My GMC has Electro Level I. The system works fine in Auto and will raise both sides up equally as it should. However when moving the RH control switch to RAISE position nothing happens. Moving the switch to LOWER position the bag deflates as it should. The LH control works fine.
I have the wiring manual showing the schematic and will have no problems troubleshooting. Pretty simple system.
What I am looking for and what the wiring schematic lacks is the interface between the RAISE/LOWER solenoids and the compressor. Only the wiring for the LEVEL CONTROL solenoids to the compressor is shown. I'm assuming the RAISE/LOWER solenoids are wired in the same way as the LEVEL CONTROL solenoids but it would be nice to see the schematic anyway.
Does anyone have this detail? I doubt I will need this information to troubleshoot this problem, It's more of a curiosity then anything.
Click here for schem. http://www.gmcmhphotos.com/photos/showphoto.php?photo=35988&title=electro-level-1-schema&cat=5607
Jon Payne
76 Palm Beach
Westfield,IN
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| Re: Trouble with Electro Level I [message #100683 is a reply to message #100677] |
Wed, 22 September 2010 15:19  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Jon--I don't have the schematic handy here, but it sure sounds like the RH 3 way solenoid is either not getting power, or may be stuck. There are 4 3-way solenoids (2 for each side). The one I'm talking about is commonly refered to as solenoid B and has 3 hoses plumbed to it. The other 3 way is for exhaust and usually only has 2 hoses on it. That solenoid B will operate in conjunction with the leveling valve when it has no power. If it has power, it will bypass the leveling valve. You may have a corroded switch (which is very common) a bad solenoid, or an open wire to it. The compressor should actuate independently of the solenoids based on air pressure alone.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Trouble with Electro Level I [message #100685 is a reply to message #100677] |
Wed, 22 September 2010 15:36 |
Jon payne
Messages: 495
Registered: May 2008
Karma: 1
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Senior Member |
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Thanks Bob that is good information!
Bruce, no the compressor does not come on.
I'm going to due some T/S this evening. I'll let you guys know what I find out.
JP
Jon Payne
76 Palm Beach
Westfield,IN
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| Re: Trouble with Electro Level I [message #100707 is a reply to message #100677] |
Wed, 22 September 2010 19:50 |
Jon payne
Messages: 495
Registered: May 2008
Karma: 1
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Senior Member |
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Found the problem - dirty connection on back of RH control sw. With the control sw in the RAISE position I had power to the RH RAISE solenoid but no power going to the AC relay. That meant either the 12VDC was not passing through the RAISE sw (Wires BRN to YEL) or there was a bad connection.
First I swapped the RH switch to the LH position and then moved the switch to the RAISE position and the compressor would operate normally. Hmmm....switch is good. So I then swapped it back to its original position and it started to work normal - AC operating when switch moved to RAISE. Dirty connection!
I like those kind of outcomes - No money spent for once!I'll put that one in the win column
And as a bonus I now have a better understanding how ELECTRO LEVEL I works!
JP
Jon Payne
76 Palm Beach
Westfield,IN
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| Re: [GMCnet] Trouble with Electro Level I [message #100711 is a reply to message #100707] |
Wed, 22 September 2010 20:07 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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While moving those wires around would have been a good time to squirt
all of the connections with CRC 2-26 or similar electrical
cleaner/lubricant as preventative maintenance. With it in hand, it
would have also been a good time to hit all the Onan connections,
especially the 12-pin connector.
On 9/22/10, Jon Payne <embrep@sbcglobal.net> wrote:
>
>
> Found the problem - dirty connection on back of RH control sw...
--
Ken H.
Americus, GA
'76 X-Birchaven
www.gmcwipersetc.com
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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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