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Old 01-09-2022, 04:50 PM   #1
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Just bought a used 2015 Jayco Seneca 37 ft. Diesel. My first time with a diesel. I am concerned about my batteries. Even though I hit to battery disconnect switch, there is still a drain on them. I have owned several other travel trailers but not a Class C. I just have to put in a manual disconnect switch right on the battery. Also, I do appreciate the info on the WeatherTec mats for the Freightliner M3 chassis. I will be asking a lot of questions in the future.
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Old 01-09-2022, 05:38 PM   #2
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Welcome to the Forum from Western New York State! Congratulations on the Seneca!

I've read there's a few things that are required to keep power to them for safety, such as the LP/CO detector and smoke detector if it's hard wired.

I have to keep a maintainer on my F150s battery if I'm not going to drive it for a while, there's that much parasitic drain. Voltage will drop to 12.2 volts after 3 or 4 days, and the battery's a year old next month.
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Old 09-09-2022, 08:03 AM   #3
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Do the House and Chassis batteries not charged when plugged in to Shore Power? My 2010 Seneca is plugged in at an RV park and I had to jump start it after not starting it for about a month. It tested 11V at all 4 batteries and jumped right up and then started fine after that. Do I need to trickle charge when plugged in, or just start it every couple days?
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Old 09-09-2022, 08:11 AM   #4
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Originally Posted by Jjnunn07 View Post
Do the House and Chassis batteries not charged when plugged in to Shore Power? My 2010 Seneca is plugged in at an RV park and I had to jump start it after not starting it for about a month. It tested 11V at all 4 batteries and jumped right up and then started fine after that. Do I need to trickle charge when plugged in, or just start it every couple days?
They should. The converter charges both house and chassis. Could be a bad isolator since it only charges the chassis as needed.
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Old 09-09-2022, 09:30 PM   #5
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Originally Posted by Xpirate220 View Post
Just bought a used 2015 Jayco Seneca 37 ft. Diesel. My first time with a diesel. I am concerned about my batteries. Even though I hit to battery disconnect switch, there is still a drain on them. I have owned several other travel trailers but not a Class C. I just have to put in a manual disconnect switch right on the battery. Also, I do appreciate the info on the WeatherTec mats for the Freightliner M3 chassis. I will be asking a lot of questions in the future.
Welcome to the Seneca family... and a WARM Welcome to the 2015 Seneca family.

You will find that most of the topics / posts / comments in the Super C section are discussing the later models (after 2018-1/2) that are on the S2RV chassis (instead of the M2 Chassis- which is really the platform that the S2RV is built on with some modifications)

However there are a LOT of the M2-Seneca owners on the forum that are very active and with a wealth of knowledge of the Seneca's built in Jayco's golden years. The 2015 model year offered a number of different floor-plans - and each different floorplan has different features and favorites...

Welcome!!!
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Old 09-10-2022, 06:48 AM   #6
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Welcome to Jayco Owner's Forum from New Hampshire
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