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Old 09-16-2019, 04:15 PM   #1
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Cannot Turn On Coach Power

Folks,
I have a 2010 Winnebago Via for the past 2 years. This past weekend I tried to turn on the coach ( Coach Power switch) and it won't complete the circuit. I hear the relay click but that's it. The coach batteries are resting at 12.8v . I removed and cleaned the terminals w/ no help. I located the coach relay which has the 12.8V on one side from the batteries but when I press the switch I only get ~3.8v on the other side.

Bad / dirty relay contact? If so, any way to clean them or I am buying new?

I am new to this forum and look forward to hearing from you.

Thanks for your help!
George
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Old 09-16-2019, 05:12 PM   #2
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Buy new. You can move the wires to one side for now to get things working.
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Old 09-16-2019, 08:42 PM   #3
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Thanks Twinboat! Are you suggesting I correctly diagnosed the issue and have a bad relay contact?

I appreciate your help.
George
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Old 09-16-2019, 10:27 PM   #4
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To test the relay, just put a jumper cable from the one terminal to the other on the relay. If it fixes the problem, buy a new one. A temporary fix can be done as Twinboat says. Take the cable off the side with no power, and add it onto the opposite side with the other live cable. This will temporarily just bypass the relay. You wont be able to shut if off with your salesman switch, but it will get you up and running for now. Ours went, and we couldn't even pull our slides in to get to our next destination. Once we figured it out, we bypassed it until we could get another relay. Some people bypass them permanently, although Im not sure why you wouldn't want the ability to shut off the house batteries. They are around 100 bucks. Mine was similar to this one. https://www.amazon.ca/INTELLITEC-010.../dp/B072N8NYN2
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Old 09-16-2019, 10:31 PM   #5
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If your coach battery disconnect is the same as , winniman, linked in his post test the fuses before you order new.
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Old 09-17-2019, 12:20 PM   #6
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Fuses are good. I placed the order and should have ti Friday. Will update.

Everything is fine with shore power, I just have a problem traveling... no fridge. ( I don't like warm beer)

Thanks Guys!
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Old 09-17-2019, 11:21 PM   #7
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Quote:
Originally Posted by Viadude View Post
I just have a problem traveling... no fridge. ( I don't like warm beer)

Thanks Guys!
JMHO: Anyone who likes warm beer , is more than a little { self edit} .

Hope you get all fixed in a hurry .
Safe Travels.
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Old 09-19-2019, 09:33 AM   #8
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Hi George! Welcome to IRV2! We're sure glad you joined the gang!

Don't mess with trying to fix it, buy a new relay!

Noticed that you are kinda new on IRV2 and wanted to say hello!

Good luck, happy trails, and God bless!
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Old 09-21-2019, 11:47 AM   #9
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Can someone post a pic of what this relay looks like and where it usually resides?
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Old 09-21-2019, 02:50 PM   #10
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Relays come in all shapes and sizes. Here is a generic relay used in many RV's to turn the 12 volt power on and off. "Typically"....the relay has a large 12 volt power cable attached to one side, which always has power. Again, "typically" they have to smaller lugs on the front of the relay. When you turn the switch ON/OFF at the door, it sends a signal to those two smaller lugs to engage the relay and pass the 12 volt power from the large lug on one side to the large lug on the other side, providing 12 volts to the coach.

Many, who never use the switch at the door, just connect the cables from the two large lugs together and eliminate the switch. This is also something you can do to test the relay and get everything back working again. Bypassing the relay is fine until you can get a new one, if you decide to replace it.

My last three coaches had what are called "run bays". Many place these "run bays" under the driver's window where all the 12 volt wiring/fuses are located.



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Old 09-21-2019, 03:14 PM   #11
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The most common house battery disconnect relay is a latching relay that looks like this.
The lower section is the latching mechanism, with fuse holders on each side.Click image for larger version

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Old 09-27-2019, 08:35 AM   #12
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Thanks to both Don and twinboat for pic's and explanation.

Question:
Is this relay also sometimes called "disconnect solenoid".

I keep a lot of records of things I learn here—especially electrical items—and I want to know if these two terms are used interchangeably and mean the same thing.
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Old 09-27-2019, 09:38 AM   #13
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Quote:
Originally Posted by marjoa View Post
Thanks to both Don and twinboat for pic's and explanation.

Question:
Is this relay also sometimes called "disconnect solenoid".

I keep a lot of records of things I learn here—especially electrical items—and I want to know if these two terms are used interchangeably and mean the same thing.
Yes. A solenoid is a relay that switchs heavy current.
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Old 09-27-2019, 01:08 PM   #14
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Thanks again twinboat.
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