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Topic: Mystery switch (Read 710 times) previous topic - next topic

Mystery switch

What is this switch?  Right side, two green wires.  Below bathroom sink.  We can't figure it out.

[fixed topic title typo - Michelle]
Matt B
1998 u-320

Re: Mystery swich

Reply #1 –
Bathroom fan lid?
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Mystery swich

Reply #3 –
Electric toilet switch?

I am going to install an official looking switch somewhere in my coach complete with wires that does absolutely nothing.  Keep 'em guessing!
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Mystery swich

Reply #4 –
Matt,

It could be a switch to a solenoid valve that recirculates water through the hot water side of the system. If the PO did a lot of boon docking they could have added this as it is a huge water saver. We have had one of those on the last 3 coaches. Now remember this was just a WAG. 
To test this theory turn on water pump and let cycle off.
Leave water pump switch on.
Press switch and see after a few second (15/20 that is how long it take for ours) if the water pump comes on.
If pump comes on press switch 2nd time to close valve.
This should let pump cycle back off after a few seconds.

Mike

Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Mystery swich

Reply #5 –
Quote from: Roger & Susan in Home2 –
Electric toilet switch?

I am going to install an official looking switch somewhere in my coach complete with wires that does absolutely nothing.  Keep 'em guessing!

Current toilet is foot pedal, though it could be for a previous electric toilet.
Matt B
1998 u-320

Re: Mystery swich

Reply #6 –
Quote from: Pamela & Mike –
Matt,

It could be a switch to a solenoid valve that recirculates water through the hot water side of the system. If the PO did a lot of boon docking they could have added this as it is a huge water saver. We have had one of those on the last 3 coaches. Now remember this was just a WAG. 
To test this theory turn on water pump and let cycle off.
Leave water pump switch on.
Press switch and see after a few second (15/20 that is how long it take for ours) if the water pump comes on.
If pump comes on press switch 2nd time to close valve.
This should let pump cycle back off after a few seconds.

Mike

I will try that in the morning.

I looked, and the general specs for our coach imcluded a Microphor toilet.  I assume the electric and not the air operated.
Matt B
1998 u-320

Re: Mystery swich

Reply #7 –
I have the same switch and have yet to find what it does. 
The toilet switch is by the toilet. 
Good luck on finding the purpose. 

Glen

Retired Nurse and Bat Chief
2001 U320 36' 450 Cummins
Past 1981 Bluebird 36' 3208 Cat
HD2500 Chevy Toad

Re: Mystery swich

Reply #8 –
Matt, get out your digital volt meter and check to see if one side ot the other of the switch has 12v.  Generally if it is a FT switch (looks like it) the +12v wire will be white and have a number on the wire every 8" or so.  Ground wires are generally green.  The unlabeled plate makes me wonder if was added later.  Being a momentary switch suggests a triggering switch like the water pump, the fill solenoid or an electric toilet cycle.  Hot water recirculation systems are rare and almost always owner (or at the owner's request) installed.  Mine uses a momentary switch to trigger the timing device which opens the recirculation solenoid valve.

We also have a momentary switch in the bathroom than triggers a latching relay to turn on a bathroom ceiling light.  Another momentary switch in the bedroom does the same

Can you follow the wires anywhere?
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Mystery swich

Reply #9 –
If momentary, it might be for the fluorescent ceiling fixture.  I seem to recall that light is wired with 2 switches, one in the dining area and one in the bathroom for some coaches.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Mystery swich

Reply #10 –
In my coach it powers the Surflo pump so we have water pressure when not hooked up like at rest stops.
Mine is a momentary switch, if the LED is on so is power to the pump, press it again and the LED goes off and so does the pump.
We have a similar switch under the counter at the kitchen sink too....

Tyson
Tyson
2004 295 3610 WTFS
2010 Honda CR-V
Motorcade #18344
AA1DS

Re: Mystery swich

Reply #11 –
We just go home this afternoon.  I will investigate further when I get some other other tasks out of the way.

I will let you guys know what I find.

Matt B
Matt B
1998 u-320

Re: Mystery swich

Reply #12 –
Quote from: flyin-tyson –
In my coach it powers the Surflo pump so we have water pressure when not hooked up like at rest stops.
Mine is a momentary switch, if the LED is on so is power to the pump,

OMB's photo shows the water pump momentary switch (with LED) as the middle switch in the gang.

He's asking about the switch on the right end with no LED and no label.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Mystery switch

Reply #13 –
Wouldn't a '98 320 have come with an electric toilet? Since it now has a pedal toilet the switch might do nothing.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Mystery switch

Reply #14 –
I don't have that switch on my 1999 u320. Just the water pump and water fill switches. All of the light switches are on the outside cabinet nearest the closets. It's factory installed or at least it looks like it. My suggestion would be to get a wire tracer and see if you can figure out where that goes to also unscrew the switch and make sure that it's still connected in back before you do too much troubleshooting.
'99 U320 40 WTFE
Build #5462,
1500 Watts Solar 600 amp Victron lithium
2012 Jeep Grand Cherokee Overland Hemi
Instagram bobfnbw
Retired