Troubleshooting Bendix Fast Idle/Cruise Control on 89 35FC 3208 ATAAC

[Richard Gideon]

Curt: Thanks for the info...I'll most likely need to replace mine.

Dick Gideon
Freedom Bird
1989 35FCSB
Rolla, MO

--- In WanderlodgeForum@yahoogroups.com, "Curt Sprenger"
wrote:
>
> Dick,
>
> FYI in case you need a CC-5 unit. The CC-5 unit is no longer
manufactured. A
> couple of us just purchased CC-5 potentiometer units through Brake
& Clutch
> Supply, Seattle, Washington. Talk to Spark. I bought one for
possible
> future need. Dick Hayden bought one because his CC was not working.
>
>
> On 10/15/07, Richard Gideon wrote:
> >
> > Thanks for the reply Ralph: Early this morning I got into
my "blue
> > box" and retrieved the booklet describing the operation and
> > troubleshooting the Bendix Cruise Control System (SD-10-1)and on
page
> > 15 of the booklet I found the symptoms, cause & remedy for what
> > appears to be ailing the CC on my FC.
> >
> > V. Cruise Control System oscillates above and below the speed
> > setting. Will not hold a specific speed setting within plus or
minus
> > 1 mph on level highway.
> >
> > Cause, CC-5 potentiometer or its wiring is defective.
> >
> > Remedy. Visually inspect for broken or obviously damaged wiring to
> > the CC-5 potentiometer (Figure 13). Disconnect wiring connector 3
in
> > Figure 13 and check the resistance between the sockets shown:
> >
> > 1 and 3 3600-4400 ohms
> > 2 and 3 1080-1320 ohms
> > 1 and 2 4320-5280 ohms
> >
> > If these readings are not obtained, replace the CC-5
potentiometer.
> >
> > I'll post later this week, with the results of my testing. Thanks
> > for the guidance...I"ll dig out my digital volt/ohmeter.
> >
> > Dick Gideon
> > Freedom Bird
> > 1989 35FCSB
> > Rolla, MO
> >
> > --- In WanderlodgeForum@yahoogroups.com 40yahoogroups.com>,
> > "Ralph L. Fullenwider"
> > wrote:
> > >
> > > PT cruise/air throttle/high idle
> > >
> > > Some time back, I posted to the files section, a couple of files
> > on how
> > > these systems work and inter act.
> > >
> > > As for the FC's it is a little difference because the factory
<BB>
> > dip
> > > switch settings allowed the fc cruise controls to work slightly
> > different
> > > than the PT's.
> > >
> > > As for the problem in the FC, where it is on or off and no in
> > between, I
> > > would suspect the CC5 potentiometer internal of the cylinder to
be
> > faulty.
> > > All this can be checked with a decent Multimeter and following
the
> > checks
> > > in the Bendix manual that should be in the blue box.
> > >
> > > The only thing I have found that was done a little funky form
the
> > factory,
> > > is how the clutch switch was wired up since there are no
clutches
> > in the
> > > Birds and that was done with 2 solenoids in the system. I have
> > actually
> > > taken those out of the system to get my cruise working properly
and
> > that
> > > was done with a pair of side cutters! One snip and you
have
> > cruise.
> > > Now the problem with the break pedal not canceling the cruise
is or
> > has
> > > generally been a bad set switch or corroded contacts in a
> > connector. And
> > > can usually be cleared up by cleaning the pin contacts coming
from
> > the
> > > Bendix control.
> > >
> > > Remember that our Coaches put out 120 to 130 psi of air and
there
> > is a
> > > regulator with the bendix set up to drop that pressure to 80 to
90
> > psi,
> > > thereby making the working difference of only a few psi
> > differential that
> > > the electronics of the bendix system reads and enacts on.
> > >
> > > >
> > >
> > > Safe travels,
> > >
> > > Ralph and Charolette Fullenwider
> > > 84FC35
> > > Duncan, Oklahoma
> > >
> >
> >
> >
>
>
>
> --
> Curt Sprenger
> 1987 PT38 8V92 "MacAttack Racing"
> Anaheim Hills, CA
>
>
> [Non-text portions of this message have been removed]
>