Pancake Compressor Power

[Pete Masterson]

The optional air compressor (and switch on the dash board) are for a
compressor that airs the coach when the engine is off. I suppose that
optional air compressor would also drive the Microphor from the main
coach air system rather than have a pancake compressor. It would have
been nice if the same circuits were used for the pancake compressor
option -- but (at least on my coach) that didn't seem to be the case.

It's difficult to know if there's a connection somewhere that is
loose or damaged (corroded) that interferes with the circuit to the
pancake compressor. I've found the wiring diagrams seem to leave a
lot to the imagination and many optional items don't seem to be
documented at all. (At least on the set of drawings I have.)

I've seen communications technicians use a signaling device to trace
phone/computer lines. I don't know if similar technology is available
for 12vdc systems -- but that would be about the only way to find the
"far" end of the circuit. The technician would hook this "thing" on a
"known" wire, then use a meter to see if a signal was present on the
"unknown" wires to find the right one. If someone knows what these
"things" are (that is, has a name for it) I'd sure like to get one to
help me find some of the circuits on my coach.

Pete Masterson
aeonix1@...
'95 Blue Bird Wanderlodge WBDA 42'
on the road outside Evergreen, Colorado




On Jun 9, 2007, at 4:06 PM, lkittel77 wrote:

> Thanks for the reply. I know the pump works fine. As a work around I
> put a 12 volt battery in the compartment with a trickle charger.
> Works great but certainly is not a permanent fix. I have checked all
> known fuses and especially given the one labeled air compressor
> (Option) a double check. All is well with fuses.
>
> I am still confused.
>
> --- In WanderlodgeForum@yahoogroups.com, "Leroy Eckert"
> wrote:
>>
>> Do you have a schematic? Totally different coach here but mine has
> a pressure switch on top of the pump that cuts it on and off at
> determined air pressure values. Mine also has an on/off switch. Have
> you looked at the pressure switch to see if it has power? Power to
> that probably comes from a relay which is located in or near a load
> center. It is fused somewhere in the coach. If the fuse is blown, you
> need to look for the reason. Just running a wire could cause other
> problems.
>>
>> Leroy Eckert
>> 1990 WB-40"Smoke N Mirrors"
>> Niceville, FL
>> ----- Original Message -----
>> From: lkittel77
>> To: WanderlodgeForum@yahoogroups.com
>> Sent: Saturday, June 09, 2007 3:27 PM
>> Subject: [WanderlodgeForum] Pancake Compressor Power
>>
>>
>> I have lost power on my BMC 40' to the pancake compressor that
> provides
>> air for the toilet.
>>
>> I have verified that the ground is good. I have traced the
> positive
>> wire to the point where it dissapears into slit duct inside the
> wiring
>> compartment on the side of the coach.
>>
>> Does anyone know where power for the pancake compressor
> originates. Is
>> there a switch or fuse somewhere. I am about to give up and just
> run a
>> new wire.
>>
>> Thanks
>>
>> Lindsay
>> 1996 BMC 40'
>>
>>
>>
>>
>>
>> [Non-text portions of this message have been removed]
>>
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