"I wonder how many Winnebago (.... or other MH's with direct-connect battery solenoids with a Ford chassis) owners have this happening and are not aware of it because they do not have a monitoring voltmeter on their dash to tell them? They are then sometimes, but not always, faced with arriving at their camp site with partially depleted coach batteries and wondering why "their coach batteries aren't performing well".
I "THINK" that this may be caused by something in the Ford alternator's sensing electronics whereby they are getting "tricked" somehow into sensing a chassis battery voltage that is too high to need any charging voltage applied from the alternator. Somehow my cycling of the coach battery bank's disconnect switch may be serving to correct this sensing/logic error."
We have an Itasca 24V. That relay quit working on a trip this past spring, it would open and close but no power would flow through it. Yours may be heading the same way and will quit soon.
Sorry pinchols, I didn't do that right.
* This post was
edited 08/28/08 05:52am by Dusty R *
Thank MNTundraRet, Pierrem, and pnichols for the useful feedback. Sounds like what I've located is what I need to test. It is, in fact, located on the right side of the engine compartment under the coolant like you said pierrem.
I'll try testing the house battery side of the solenoid while the engine is running to see if the charge voltage goes up. If that doesn't work. I'll try flipping the battery disconnect switch as pnichols recommended.
2007 Four Winds 31F Class C; Ford E450 Chassis; 250 Watts Solar;
I had a chance to test it out tonight with no success. What I thought was the solenoid (under the coolant) appeared to be a relay attached to the emergency start switch (see picture).
I tested the voltage on the chassis side with the engine running. It read a charge voltage of around 14.2V. The house side remained at 12.6V. The house side would go up to the charge voltage only when the emergency start switch was pressed. I was able reach around and hit the switch with my right hand and feel the relay in the engine compartment with my left hand click over. I also toggled the battery disconnect switch to see if that did anything. Unfortunately there was no change.
I'm wondering if I even have a battery isolator. I'll see what the manufacturer says.
Thanks for all of the help. This is a great forum.