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Old 02-13-2015, 06:47 PM   #1
Steve and Sharon
 
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2015 27' FB International
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Battery issues new 2015 27FB International

Well, I have had my coach out twice and continue to be baffled by the battery system. Sometimes it seems to work, and others it doesn't. I just returned from the dealer after having an awning package added and had them check the batteries which they say are good. After towing it home, I thought I would check the condition of the batteries and placing the "in use" with to in use resulted in nothing. I assumed the battery was dead and wasn't charged by my tow vehicle. So I then plugged it into shore power at the house overnight. After 24 hours with the "In use" with in the in use position, I unplugged the shore power and went to check the battery. Sure enough everything seemed to work. I then attempted to cycle the "in use" switch. Turned it off and then back on....no power, the battery would not connect. While in that state however, the inverter powered up just fine. Now I am really confused as to where to start looking to solve the problem. We are planning a six week adventure and I don't want to start the trip until I can solve this.
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Old 02-13-2015, 07:10 PM   #2
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From your description it sure sounds like the USE/STORE switch (relay) is not working right. Since the inverter is not connected through that switch, and it is working properly, there has to be power in the batteries. The fact that the coach also worked for a while until you cycled the switch, then didn't work again points to a problem relay which is erratic. I hate to say it, but another trip to the dealer may be in order.

The only other thing I can come up with is a bad connection at the battery for the wires which powers the coach. They are different than the ones which power the inverter. So, check the battery connections carefully on both the + and - sides. There will be two large wires on each, + and -. One is for the inverter, the other for the coach itself.

I can't think of any other thing which would cause what you are experiencing.
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Old 02-13-2015, 08:24 PM   #3
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that would be nice but the dealer is 4 hours away.....I was hoping they would solve it on the last trip. I will look at the batteries in the morning. Thanks for the advise
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Old 02-13-2015, 08:32 PM   #4
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You may have a loose wire in the converter. It will operate everything in the trsiler, but the power won't make it to the battery.
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Old 02-13-2015, 09:31 PM   #5
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My vote is the relay. You should hear a noticeably loud click near the battery area when pressing the button. Should hear it every time.
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Old 02-13-2015, 09:41 PM   #6
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If the relay is the problem its a easy DIY fix. The dealership can mail you a replacement. First disconnect the battery cables then replace out every wire, one at a time. The relay will be located near the front of the trailer near the batteries with some other boxes and wires. It sort of looks like a small top hat. Follow the wires from the batteries to find the relay.
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Old 02-14-2015, 12:35 PM   #7
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My 2014 International had a similar problem. I allowed the batteries to go dead while at the storage facility. With spring on the way I decided to tow it to the dealer for some minor warranty work. After hitching up by manually cranking the electric jack, I set off for the dealer. It's a two hour drive so I figuered the batteries would charge on the trip. To my amazement the batteries were still dead upon arrival.
The service manager told me that the battery switch must be in the "use" position or the batteries will not charge while being towed.
I do not remember this being the case with my 2007 International.
Give it a try and see what happens for you.
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Old 02-14-2015, 01:09 PM   #8
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Here is a photo of the use/store solenoid that lurks under the settee in my unit. Ensure that all connections are tight. Also ensure that the fuses in the top are tight and not blown. Jim


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Old 02-14-2015, 01:21 PM   #9
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Checking connections

With all shore power and batteries disconnected, pull the "IN USE" switch out of the wall. Making certain the electrical connections do not touch anything, reconnect the batteries and measure the voltages from the connections of the switch to a good ground. With shore power connected do the same. Then switch the IN USE to off and measure again. Cycle on/off several times and if the switch is always consistent it is probably OK and the relay is the culprit.

Caution, be extremely careful not to allow anything to short out. I will use tape to hold things securely so as to avoid accidentally having a hot side touch the metal of the trailer, or worse, have me between the hot and ground. This is not a pleasant sensation....

Good luck
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Old 02-14-2015, 01:26 PM   #10
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Quote:
Originally Posted by Jim Flower View Post
Here is a photo of the use/store solenoid that lurks under the settee in my unit. Ensure that all connections are tight. Also ensure that the fuses in the top are tight and not blown. Jim


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Old 02-14-2015, 04:22 PM   #11
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I hope someone is still following this thread. When I took the disconnect switch off, i noticed that there is one slot behind the circuit board that does not have a wire in it. I was curious if that is the way it should be wired or is there a wire missing on the switch. I tried to upload a picture.
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Old 02-14-2015, 05:39 PM   #12
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The switch that is most likely not working is as shown in post 10. There are the correct number of wires in the on / off switch that you have shown. You have to look at the other end. Jim


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Old 02-14-2015, 05:58 PM   #13
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If your 27FB is like my 2013 model the switch is located in the front storage area, curbside, behind a piece of partition that the storage light is attached to. You may find it easiest to remove the bed mattress then remove the bed plywood base for easiest access. Its just held on by a lot of screws. If your lucky it may just be a loose wire.
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Old 02-15-2015, 11:26 AM   #14
Steve and Sharon
 
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Well, I got up this morning and started to look at the relay for a possible loose wire....they all seem tight. I did notice that on both sides the end of the wire from the fuse on top is touching/attached to the post where the main lines attach. Is that the way it is suppose to be? It is the same for both the red and green line inputs. Here is what it looks like somewhat blurry.
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