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House Battery (not?) Charging from Coach Alternator

Yahoo Message Number: 9878
My coach (house) batteries charge from the alternator when the chassis engine is running I believe? At least my batteries would always be charged after I was driving the coach.

Now it (anecdotaly) seems that they are no longer getting charge when the engine is running.

If my first statement is indeed true and my second too - where should I look to find the culpret? The house batteries do charge from shore power (I think that is working fine) and from the Genset (I think that is working fine)

It would seem there is a battery isolator from the house and engine batteries - There is in fact even a switch whereby you can force the house batteries to connect to the engine batteries to start it if the engine batteries are dead....

Maybe a connection or wire came loose? It seems I drove for 6 hours and my house batteries were not charged so that why I think there is a problem?

Thanks

Be well,

~
Victor - KI6IM
Kodiak Diesel Dutchmen 34H Bunkhouse

Re: House Battery (not?) Charging from Coach Alternator

Reply #1 –
Yahoo Message Number: 9879
A while ago I had this problem with my 2005 GS Endura 6316.

Turned out to be a bad solenoid. The solenoid couples the two sets of batteries together when a control signal switches it on. The control signal comes from a device (called an isolator relay delay) that monitors the the voltage of the chassis batteries, and when that voltage rises above 13.X volts, it sends the signal (after a 13 second time delay). It's a separate circuit from the switch that will start the engine if the chassis batteries are dead.

These links have pictures of the parts I am referring to.

http://www.ebay.com/itm/Cole-Hersee-12V-Insulated-Continuous-Duty-85A-SPST-Solenoid-24059-/221130626887?pt=Boat_Parts_Accessories_Gear&hash=item337c699747&vxp=mtr

http://www.ebay.com/itm/RV-INTELLITEC-ISOLATOR-RELAY-DELAY-PN-00-00629-120-/160819401018

Both of these items are located above the house batteries in my vehicle.

Good luck tracking it down.

Charles


 

Re: House Battery (not?) Charging from Coach Alternator

Reply #2 –
Yahoo Message Number: 9881
I had the same problem and it was the solenoid, also couple of wires with it were loose.
Can get new one at NAPA

From: Lynn Jones
To: KodiakChassisClassC@yahoogroups.com
Sent: Wednesday, September 26, 2012 12:39 PM
Subject: Re: [KodiakChassisClassC] House Battery (not?) Charging from Coach Alternator


A while ago I had this problem with my 2005 GS Endura 6316.

Turned out to be a bad solenoid. The solenoid couples the two sets of batteries together when a control signal switches it on. The control signal comes from a device (called an isolator relay delay) that monitors the the voltage of the chassis batteries, and when that voltage rises above 13.X volts, it sends the signal (after a 13 second time delay). It's a separate circuit from the switch that will start the engine if the chassis batteries are dead.

These links have pictures of the parts I am referring to.

http://www.ebay.com/itm/Cole-Hersee-12V-Insulated-Continuous-Duty-85A-SPST-Solenoid-24059-/221130626887?pt=Boat_Parts_Accessories_Gear&hash=item337c699747&vxp=mtr

http://www.ebay.com/itm/RV-INTELLITEC-ISOLATOR-RELAY-DELAY-PN-00-00629-120-/160819401018

Both of these items are located above the house batteries in my vehicle.

Good luck tracking it down.

Charles