I helped one of our club members who also had a problem with her coach
batteries draining.
In the back where the house batteries are you have a 50amp circuit breaker
and a solenoid. When the boost switch is activated the solenoid bypasses
the 50 amp circuit breaker (takes a lot of amps to crank engine over) and
engages the front solenoid switch to enable the engine to start from the
rear batteries. On the rear solenoid there are four electrical connections
two large post for the battery cables and two smaller posts for the
switching wires. One of the smaller posts is grounded and the other post
supports the wire from the boost switch located up front on the dash. One
of the smaller post will have 12v power and if that post is where the boost
switch wire is connected you will have continuous power to the boost switch
therefore the front solenoid would be engaged and would drain your house
batteries. To check for this condition use either a meter to check for 12v
on the smaller post,use a circuit tester light or disconnect your engine
battery and try to start the engine without engaging the boost switch.
Since you did replace the solenoid I would check the connections.
http://www.harborfreight.com/612v-circuit-tester-with-5-ft-lead-61652.html
> Another method is to fully charge the house batteries then connect a test
> light between the negative terminal of the battery and the cable. ( the tip
> of the light on one and the ground clip on the other) It will light if
> there is a drain present. Individually disconnect circuits until the test
> light dims dramatically or ideally goes out all together. Once you have
> made the light go out or dim dramatically reconnect the circuits you have
> removed until the only remaining ones are the ones which impact the light.
> Investigate those remaining loads which are causing the light /drain.
>
> Sully
> 77 eleganza 2
> Seattle
>
> > Fred, disconnect ALL LOADS FROM THE HOUSE BANK. Recharge by a known good
> >
> > source. Re connect one load at a time, and check discharge rate. What I
> >
> > would do.
> >
> > Jim Hupy
> >
> >
> >
> > On Dec 16, 2016 6:06 PM, "Kathy and Fred Estabrook"
> >
> >
> >
> >
> > > ---------- Forwarded message ----------
> >
> > > From: Kathy and Fred Estabrook
> >
> > > Date: Fri, Dec 16, 2016 at 7:01 PM
> >
> > > Subject: Dead House Batteries
> >
> > > To: "gmclist"
> >
> > >
> >
> > >
> >
> > > I have two dead house batteries and can't find out why they discharge.
> > The
> >
> > > batteries are two years old and seem to hold a charge when they are not
> >
> > > connected. I have taken out the house fuses, checked the circuits but
> >
> > > there still seems to be a drain from somewhere in the system. I also
> >
> > > replaced the rear battery solenoid and checked the relay switch but
> > still
> >
> > > no joy. The batteries were fine two days ago then suddenly went dead
> >
> > > overnight. The engine battery works fine. Any suggestions???
> >
> > >
> >
> > > Fred Estabrook
> >
> > > 76 Ell ( Lady K )
> >
> > > Florence AZ
> >
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--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
