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| Re: Wall switch panel issue? [message #359621 is a reply to message #359619] |
Mon, 19 October 2020 22:48   |
SpookyEng
Messages: 208
Registered: June 2016
Location: Navarre, FL
Karma: -5
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Senior Member |
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What year and model of coach do you have? In my 78 Royale the fuse is on a panel next to the main circuit breaker box.
JD Lisenby- USAF Ret
1978 Royale-455
MacDash, Manny Tranny, FI-tech, 3.70 etc etc
Navarre, FL
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| Re: Wall switch panel issue? [message #359639 is a reply to message #359638] |
Tue, 20 October 2020 10:51 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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If you don’t have as bad fuse remove the screws that hold the panel And check for a loose wire and make sure there is 12 volts also the switch may need to be taken apart and cleaned
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Wall switch panel issue? [message #359640 is a reply to message #359639] |
Tue, 20 October 2020 11:00 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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I can go over wiring 101 again. Start with the source of power. Connect
your test apparatus (lamp or meter) to a known good ground, and then test
your test apparatus to see if it functions. If that proves good, then go to
the circuit in question, at the fuse, and verify your fuse. Then, follow
the conductor to the resistance. CHECK THE LIGHT BULB, and the socket, and
the switch(s) after that check the ground conductor. You will find it. I
know, easier said than done.
Jim Hupy
Salem, Oregon
On Tue, Oct 20, 2020, 8:52 AM roy keen via Gmclist
wrote:
> If you don’t have as bad fuse remove the screws that hold the panel And
> check for a loose wire and make sure there is 12 volts also the switch may
> need to be taken apart and cleaned
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
>
> _______________________________________________
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| Re: Wall switch panel issue? [message #359644 is a reply to message #359638] |
Tue, 20 October 2020 14:28 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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I just looked on the wiring diagram and they are all on fuse 2. Start there and look for a loose connection including the fuse itself. Polish up or replace the fuse and squeeze together the fuse holder ears. If you touch anything in there and it is warm, you have found your intermittent connection.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Wall switch panel issue? [message #359651 is a reply to message #359649] |
Tue, 20 October 2020 18:09 |
Margie Van Winkle
Messages: 51
Registered: March 2012
Karma: 0
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FYI. There is a kit available to easily install multiple water pump
switches, such as in bathroom and kitchen, and even bedroom or dash. (We
always keep our pump off when not in use)
On Tue, Oct 20, 2020, 5:53 PM Matt Colie via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Ken Burton wrote on Tue, 20 October 2020 15:28
>> I just looked on the wiring diagram and they are all on fuse 2. Start
> there and look for a loose connection including the fuse itself. Polish up
>> or replace the fuse and squeeze together the fuse holder ears. If you
> touch anything in there and it is warm, you have found your intermittent
>> connection.
>
> Of course KenB is right about this, but this is also why I have a .25cal
> brass brush in my kit. It has fixed a lot of problems over the years....
> 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: Wall switch panel issue? [message #359829 is a reply to message #359824] |
Tue, 27 October 2020 14:14 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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aaronanalog wrote on Tue, 27 October 2020 14:11Ok I have power at the fuse. Power at the pump. Power at the switch when off, but nothing when the switch is on ???
Also some of the fuses have power if I remove the fuse, but not when I replace the fuse although the lights still work on that circuit?
As of now I have no fridge, no water pump, no systems monitor, no floor lights, no galley light on switch. So my whole wall + fridge is dead.
Fuse #4
1977 Palm Beach 403
Aaron,
What you wrote does not make a lot of sense...
Are you saying that there is no power at the fuse, but the lights on that circuit still work?
Do they go out when you remover that fuse? (They may be a different circuit than you expect.)
Having a meter report power (voltage) that goes away when the circuit is loaded is a typical response when the feed to the circuit has high resistance.
This is why I use a test light most of the time when I am trying to diagnose 12V stuff.
At least it is a PB, so you can get out the wiring diagram and work it backwards to fine the bad place. Really, make up a test light.
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: Wall switch panel issue? [message #359841 is a reply to message #359619] |
Tue, 27 October 2020 20:56 |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Senior Member |
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On my 77-78 house wiring diagram it shows the water pump, porch light, floor lights, monitor gauges and the door galley light as being on fuse #3 with a #12 purple wire coming off the fuse panel.
It shows the fridge, hall and LPG compartment lamps being fuse #4 with a #12 white wire coming off the fuse panel.
The fuse clips are held to the main power bus-bar by rivets. They are know to loosen and lose connection when power is drawn... in other-words you can remove the fuse and see power at the fuse clip, but when you install the fuse and current is drawn, the power is lost across the rivet connection. Use your voltmeter or test light to look for power at the input to the fuse and the output side of the fuse. Each point where there is a connection could be faulty. Also I have seen in my 45 years of mobile electronics experience where the fuse itself can be internally faulty but the link does not show as "blown".
You say you see power at that pump, but the pump does not run. There is a pressure switch at the pump which could be faulty. There is also an inline fuse at the pump witch could be faulty or its connection is faulty.
As for laps working with the fuse removed, I can see that happening with the Galley lamp. It is fed directly from fuse 1 and also from the galley door switch on fuse 3.
I have replaced my glass fuse panel with an ATO fuse panel because the connections in the OEM glass panel were intermittent.
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: Wall switch panel issue? [message #359847 is a reply to message #359619] |
Wed, 28 October 2020 11:00 |
aaronanalog
Messages: 23
Registered: February 2016
Location: Full Time Traveling
Karma: -2
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Junior Member |
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Ok thanks. I was checking the fuse panel at the wrong location when a fuse is installed, thus grounding out my test circuit by completing the loop.
Will test everything again. Could be the panel.
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