DC electrical circuit

[George F. VerDuin]

Hi Don.



On 01/07/2012 11:53 AM, "PDMcCripe@aol.com" wrote:

 

Greetings all,

    We
recently began to experience intermittent failure of
the old Dometic RM 3804 refrigerator, indicative of
an impending circuit board replacement or repair. 
However, the problem has compounded in as much as I
discovered also the failure of the essential DC
electrical power to the rear of the refrigerator.
Replacing the power source with an external 12 vdc
battery restored operation to the refrigerator. I'm
unable to locate the fuse or other protective device
for that circuit in either the forward electrical
bay or in any overhead compartments. Does anyone
have an idea where this seemingly easy-to-find item
would reside in a 1991 year/model PT40?

Mine is a 1995 BMC so we will not be a carbon copy.

The refer needs continuous power so the source should be

   after the battery disconnect switch

   before house and ignition master relays.

I believe the BMC feed point is adjacent to the charger/inverter on
a post with 8 wires.

There are a few, but perhaps not the refer, circuit breakers in the
road-side basement as well.

They are "mount on the wall" type devices, not part of a bus bar
distribution array.

I'll know better when I finish cleaning up the connections before
spring [I have some corrosion].



The intermittent nature of your failure sounds a bit like mine.

My issue is with 15+ years of open connection block exposure to
whatever.

The last straw was needing to hire a mechanic to find a bad
connection on the hydraulic pump for the levelers.

Now I have a "mission".

Protective devices also sometimes fail in this mode when they are
the self-reset type.

The worst-case failure might be vibration caused insulation failure
for a wire [tough to find and repair].

    Also, back
in September and October I was searching for
replacement faucet cartridges for my shower/tub. 
All the responses I received referred me to Moen. 
Moen however has denied ownership of the design I
presented them in a photograph, pointing out that
Moen is plastic and my cartridge is all-metal.  I'm
still searching.  I can't declare with certainty
that what I'm trying to replace was an original part
and it bears no manufacturer's name or number.  This
particular installation is somewhat difficult to
access by any approach other than destructive.

I wonder if there is not some private rule in the plumbing industry
to not identify the make and model on the device itself?

My experience is like yours to the extent that my only solution was
to take the "guts" of the shower valve to a plumbing supply house
for them to match.

I'm certain I pay more there than in one of the box stores...

    Heading
for Quartzsite in a week to join the Southwest
Bluebirds and will continue the search there.

 

Regards,

Donn Borden

Montana

Best of luck with your volt meter and pliers...

Skip

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