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Old 08-23-2015, 03:23 PM   #11
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It's not wired to the tow vehicle, from the battery. Just a clarification on what I posted. Thanks
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Old 08-23-2015, 03:57 PM   #12
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I have a 2015 Sanibel 3601 and new from the dealer it only had one size 27 deep cycle battery. My TV I found out was not charging the battery the 30 amp fuse had blown with the old 5er I think. When I checked the relay and replaced the 30 amp fuse the Sanibel will run all day on the TV without discharging the battery. When we stop and shut off the engine on the TV while we are eating lunch or similar it will run off the battery but it is slow to make up for the discharge used during the stop. It may take 3-4 hours to charge back to the place it was prior to the stop. Bottom line I can run the frig all day on the road and will still be about 3/4 full with the battery when we stop for the night.
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Old 08-23-2015, 05:08 PM   #13
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Pronouns get me. IT'S not wired to charge? The TV or the TT? Sounds like the TV is wired so find out where that leg of the TT plug is going. Mine is hot from the house and not when "the main battery" switch in the coach is off, but if I understand residential frig wiring, the "factory battery shut off " does not shut off the frig inverter. If that is so, your problem may be as simply as the main battery shut off was off when you were towing.
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Old 08-23-2015, 07:20 PM   #14
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As a newbie I was unaware of the extra fuses required to charge through the trailer plug so my battery was not charging while in tow. The dealer was aware the truck manufacturer stored the extra fuses in the glove box. Inserted these in the fuse box of the truck and the problem was solved.
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Old 08-23-2015, 07:55 PM   #15
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Is there any reason you don't just switch to propane when towing? Then your battery won't run down. We never run ours off the battery when towing.
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Old 08-23-2015, 08:02 PM   #16
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It is a residential frig there is no propane option on that type of refrigerator.
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Old 08-23-2015, 08:04 PM   #17
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Ok then I don't have one so never mind.
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Old 08-24-2015, 01:03 AM   #18
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As stated, the fuse and relay are installed. I was told that the trailer is not capable of charging the battery when towed. The battery disconnect switch is set for battery on.. Sanibel was a early 2015 model actually built in 2014. RV specialist told me that it wasn't set up. To charge single battery by tow vehicle. Sorry didn't mean to get this crazy
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Old 08-24-2015, 01:57 AM   #19
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Then I get your earlier comment You need to add that circuit and while you are at it Add that second battery Maybe TWO big golf cart batteries or four if there is room

Good luck
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Old 08-24-2015, 08:25 AM   #20
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My Sanibel is also a 2015 model made in early 2104 when they start the new model year and it has the power wire from the plug to the battery. If I were you I would check that I have 12V power first on the connector pin 4 from the truck with the engine running and no lights on. If you have power there I would then check the RV, remove the negative lead from the battery, so you are not reading RV battery. With the truck running and the RV plugged into the truck you should then read 12V on the negative battery lead.
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