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Old 12-28-2017, 07:36 AM   #1
Winnebago Owner
Join Date: Oct 2017
Posts: 97
Coach Battery Disconnect Stuck On?

Hello all, Merry Christmas and Happy New Year.

My 2008 Journey 39Z is in storage here in Northwest Arkansas where currently it's 25 F.

Yesterday we drove to storage to put a few items in the coach. My wife asked for lights so I hit the battery disconnect switch and on came the lights. Meanwhile I decided to check the battery voltages, all looked good.

When we got ready to leave I tried to use the battery disconnect to shut things down but nothing happened. I tried multiple times but nothing changed.

Since I wasnít prepared to work on the coach I connected a trickle charger and headed home to research the situation.

As always Iíve found all kinds of useful information and have a few ideas on improving this system in the coach.

But, for the time being, has anyone experienced this situation? Could it be just SO COLD that the disconnect solenoid worked connecting the batteries but wonít shutoff or have I had a failure of some sort?

I enjoy automatic functions until something like this happens then well here we are. Itís supposed to warm up to 37 today so Iíll go back out and try it again.

Could a circuit breaker have tripped? Switch failed? Relay/solenoid failure?

During my research I found threads about adding a manual shutoff, like the chassis battery has, and taking the auto function out of the loop. I also read about replacing the solenoid with a Blue Sea unit. If you have a better way of addressing this I welcome your ideas.

Thank you!
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Old 12-28-2017, 07:00 PM   #2
Winnebago Owner
Join Date: Oct 2017
Posts: 97
Battery Disconnect Stuck ON

Well, I figured out why the battery disconnect wasnít working. It wasnít the cold weather but it certainly didnít make my job figuring it out easy.

The 2008 Winnebago Journey 39Zís battery disconnect solenoid is located in the left rear exterior electrical bay. Itís mounted on the chassis behind the circuit breakers. You have to remove the panel that the CBs are mounted on to get to the solenoids.

WARNING!! The CB ďHot Bus BarĒ is not protected and can easily short when removed if the batteries are connected.

The wiring behind this panel can be referred to as a ďRatís Nest of WireĒ. Multiple wire bundles in their plastic conduit randomly wrapped up with large wire ties. I guess the process is grab a bunch of wires and tie them up. Winnebago could do a better job of running and organizing these wires, Iíll explain later why this disappointed me so much.

Iím including pictures so you know what this solenoid looks like and how the control wires are connected.

Once I could get to the solenoid I figured Iíd tap on it to free it up in case the cold had locked it up. BTW, I called Winnebago and they felt like the cold weather was probably the problem.

Up to the front and voila... it works again! Well... not so fast... I was able to cycle it a few times and then... nothing... Back to the rear, another tap or two and back up front... worked twice and then stuck again in the ON position... right back where I started. The only thing heating up was my temper.

Time for a closer look. On top of the solenoid is a fuse block and a 5 amp fuse. Iíve included a closeup photo. This is a fuse for the wire that carries power to the front disconnect control switch (on/off). I could see the fuse wasnít blown but I decided to remove it and inspect it. The fuse was fine so I inserted it back into the holder. As I did I saw the power wire move down and out of the fuse block.

Iíve circled this wire in the photo. There you have it, intermittent operation. Pure coincidence the solenoid stopped working on a cold December day. I pushed the blade connector back up into the fuse block and tested the system. Everything worked great!!

The three wires that control the solenoid have their own conduit. The conduit was tied to other wire bundles and it was pulling the wires tight. You can see this in one of the photos. This is what is so disappointing and makes me wonder what else will randomly quit working because of the same situation. When the weather warms up (and the wires and working conditions) Iíll disconnect the batteries and fix that mess. Iím placing blame on Winnebago but I suppose itís possible someone else could have messed this up but it seems to be in line with the rest of the wiring in this coach.

I feel very fortunate to have found the problem relatively quickly without spending a bunch of money. I hope my experience can help someone else that has the same problem.

Take care!
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Old 12-28-2017, 07:04 PM   #3
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attery Disconnect Stuck ON

Solenoid Pictures
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Old 12-28-2017, 07:09 PM   #4
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Sorry about the picture orientation...
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Old 01-02-2018, 04:59 AM   #5
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Location: Jacksonville, Fl
Posts: 149
Thanks for letting others know of this potential problem and its fix.
Glad you got it worked out.
2013 Winnebago Sightseer 36V
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Old 01-02-2018, 05:16 AM   #6
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Location: St Albans in the UK
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Also, thank you for the detailed description. Anything electrical, that comes and goes, is usually a dodgy connection. As an, albeit now retired, electrical engineer, the wiring on these machines, to me, leaves a lot to be desired. Birds nets, including random unmarked fuses abound, and have they never heard of colour coding. If any apprentice I ever had produced such shoddy work, he would have got short shift.

Wire lacing, a dying art.
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Old 01-02-2018, 07:56 AM   #7
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Location: Spring Branch, TX
Posts: 1,727
Over on the Newmar forum on folks with brand new $350,000 NewAir coaches were complaining about the rats nest wiring, too. So, this isn’t just a WBGO issue. But it sure is an issue. It seems the manufacturers have pre-made wiring harnesses that apply to many coaches with different equipment. I had to replace the Riverpark radio/GPS “core unit” and the wiring behind that unit was not only a tightly wound bundle of snakes but at least half of these wires and cables were not connected to anything.
2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
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Old 01-10-2018, 04:54 PM   #8
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Ironic that I read this after finding precisely the same thing (loose wire connection at bottom of battery relay fuse block) on my 2010 Aspect 30C just a few weeks ago. Thanks for the excellent description and photos. I know first hand that this area is as close to inaccessible as it gets.
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