Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 12, 2025 ...

I'm not at the coach, so I do not have access to the electrical diagrams.  Even if I did, I'm not sure I would be able to figure out the answer to the question "Can I disconnect the house batteries, run the genset and use the boost to charge the start batteries?"
 
Reason for my query is that I may have to leave the coach at a repair shop (darned Dash A/C issue for 2011) and I may not have the time to properly charge the coach & start batteries prior to bringing the coach to the repair facility.  So, I'm thinking that I'll disconnect the coach battery bank so as not to tax the alternator unduly.  And, if I have to, instruct the repair shop to run the genny and set the boost switch on for that length of time.
 
If someone has an alternate way to achieve the same results, please let me know.  I just don't know if the "boost on" takes its juice from the isolator or what?

If you are going to run the generator anyway, why are you disconnecting the house batteries.
Let the Gen charge both sets with boost ON.
Have the Gen running when you drive it to the shop & you wont tax the Alternator.

Quote from: Barry Beam – May 02, 2011, 06:27:37 pm

If you are going to run the generator anyway, why are you disconnecting the house batteries.
Let the Gen charge both sets with boost ON.
Have the Gen running when you drive it to the shop & you wont tax the Alternator.

Yes, I plan to do this process as you describe.  Issue is while the coach is at the repair facility.  It may sit there for a few days before they get to it.  The start batteries being 7 years old, I'd like to leave instructions to run the genset for a few minutes to charge the start batteries prior to engaging the starter.

Why are you leaving it for so long. I went to Thermo King and they fixed up my whole Dash AC unit lines and condenser unit in one day.

Peter, When I need service on the coach, I NEVER leave it at a shop unless I am present to control all parts of the safety of the coach.  If the shop is unable to schedule a time when they can do the work, I either camp out, or go to a different shop.Some times there comes a point where you need to make a decision before they con proceed, with you there is makes it a simple issue, if your off fishing, things get backed up
If the shop will not permit you to be with your coach, find a different shop.
Do not let them give you the insurance rules, "No one is allowed in the shop", that is pure HH (Horse Hockey). It is intended to limit people loitering in the shop.
Bottom line; No one gets the opportunity to snoop or mess with my coach while I am off fishing or what ever.
Just an opinion from a dummy