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Old 09-14-2017, 06:43 PM   #1
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Join Date: Jul 2016
Location: adger
Posts: 44
coach battery

We have 2016 31ds and the coach batteries
are charging fine when on Gennie,and shore
power.
Doesn't seem to be charging on engine when driving.
I know the relay by battery compartment
has something to do with charging system?
trying to get some ideas before daybreak
Thanks
Katiedog
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Old 09-15-2017, 10:50 AM   #2
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Join Date: Feb 2017
Location: Melbourne
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There are 4-6 fuses in the coach battery compartment in my Seneca. Two are located at the base of the solenoid. They are difficult to reach, but worth looking. Also, if you have the "emergency start" button down below your ignition key, start the truck and press that button. Sometimes it's enough to kick the solenoid into action. After you get home, get it to the shop or an electrician to find out what caused the problem. It can be many things, from sulfated batteries, power drain from malfunctioning device, bad solenoid, etc. One step at a time.
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Old 09-15-2017, 11:02 AM   #3
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Join Date: Nov 2016
Location: Zanesville
Posts: 25
On the Seneca there is two relays the battery cutoff relay and the battery isolation relay. The battery isolation relay is the one that monitors the chassis and coach batteries and open and closes too permit charging from the engine alternator.




ohiocamp

Seneca 37HJ
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Old 09-24-2017, 05:52 PM   #4
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Location: adger
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Following up on our issue with the coach battery not charging while driving.
On the Grayhawk 31DS ford , there is a solenoid or relay mounted to upper edge of the firewall. After following wire back from Coach battery I found it.
Glad I did!! The terminals were very loose and the added resistance cause the
boots and insulation to melt. After tightening. the solenoid kicked in and is working.
It still will be replaced since the heat distorted the plastic cover.
I have had RVs for 40 years and every Solenoid was made of steel!!
They can run warm.
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