'85FC31 Security Light issue... update!

[James]

Hi Ralph:

Good to hear from you and I sincerely appreciate your input. I will
try what you suggest tomorrow but have one question: Are you referring
to the roof mount Air Conditioner switches above the driver (my FC31'
has two roof airs)?

Also, even though the Digitell works when the issue is present, the
radio and CB do not. If they all go through the 12VDC filter you
mentioned, we may have another problem. I know the radio was replaced
my the previous owner, but the CB is OEM and in its original spot.

I'll run through these things tomorrow and write back with my
findings. Stay warm and think sunny thoughts!

Thanks,
JR
85FC31 "The Short Bus"
N Fort Myers, FL

--- In WanderlodgeForum@yahoogroups.com, "Ralph L. Fullenwider"
wrote:
>
> Hello JR:
>
> We are having snow flurries in Oklahoma today and it is BRRRRR! Ok,
so not
> as cold as the frozen North but still brrrr.
>
> One important thing to note here is the old axiom of "little power
moves
> big power." The A/C units and electric heaters are picked by heavy duty
> relays that is controlled by 12 vdc. The landing lights relays are
> controlled by 12 vdc. So now the 120 VAC circuits are removed from the
> equation so lets think "control voltage" and that control voltage
being 12
> vdc we need to start narrowing down to which part of the dc control
system
> goes haywire when it's button is pushed. There are 2 load centers that
> control the front and rear landing lights. Both are on the drivers
side,
> one in the rear load center and the other in the front load center.
>
> Some a questions
> 1. Is the summer/winter switch in the winter position?
> 2. Are the three selector switches over the drivers head off or on?
> 3. With the Coach in reverse and the back up light switch on the
dash to
> on, do the halogen back up lights work?
> 4. Do the front driving lights come on?
> 5. do both the front and rear landing lights not work? and have you
tried
> them separately and do you hear a loud "click" when the landing light
> switch is switched to on?
>
> There is no single "source" of power for each of these systems but
there
> may be a single 12vdc control voltage source for the 4 or 5 relays that
> come into play.
>
> Since the digitell works during the outage, we can pretty much
eliminate
> the 12vdc filter unit under the sofa, that is the long tall white unit
> usually near the back. ALL 12vdc going to the electronics, ie:
radios, cb,
> clocks, times, report center in Galley go through this filter unit.
>
> I know this is long winded but process of elimination can be
arduous. Check
> the open contact relay in the left front load center, (drivers side
small
> overhead compartment near the bath wall, in the Salon) to be sure
nothing
> as laying across the exposed contacts.
>
> There are 2 large circuit breakers at the base of the steering
column, I am
> not talking about the Master 12 vdc cut off switch.
>
> All this is off the top, sorry, I need to g out to my Coach and get the
> prints and will do so in a bit.
>
> I am thinking there is one control wire that is bare, has a connector
> touching or perhaps a shorted relay coil going to ground when switched.
>
> Safe travels,
>
> Ralph and Charolette Fullenwider
> 84FC35 "Ruff Diamond"
> Duncan, Oklahoma