Classic ZF trouble..?? 87FC35

[one_dusty_hoot]

Alan,
You need to know why you only have 7.5 VDC
Start at the battery, check all connections, check with a meter.
Measure across each battery, then the total voltage of the two in
series. Could you have a defective battery? Maybe a bad ground?
7.5 V may not cause the starter solenoid to operate, or the fuel shut-
off solenoid fro that matter.
You find this and you probably will find the transmisson works fine.

Bob Janes, '87FC35, Greenville, SC

--- In WanderlodgeForum@yahoogroups.com, "pattypape"
wrote:
>
>
>
> Alan,
>
> Not trying to simplify your problem, But I would try the easy
stuff
> first. Check, the Neutral button, the Anti/Theft switch on the
> dash, and the 12 volt master shut off.
>
> Bill 88 FC Michigan
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Alan"
> wrote:
> >
> > 5pm Monday update:
> >
> > I spoke to Dan at ZF trans in Chicago. He was extremely
helpful.
> > We verified I do have low voltage. (7.5v) On my control module
> > wiring harness, pin #19 is the hot wire. He told me I could
> jumper
> > it from a 12 volt source until I locate my problem. I was
anxious
> > to try this to move my coach from in front of my house (so my
> > neighbors don't get upset).
> >
> > I started the coach, applied 12 volts to pin #19 and the
> > transmission engages better than it has in the 2 months i've
owned
> > it. So, I turn it off. Put a few things up and get ready to
> > relocate it to my back yard.
> >
> > Now the coach won't turn over at all. I also discovered my front
> > load panel has a 75amp relay. I was only getting 7.5 volts out
of
> > it to my lower row of circuit breakers. I subsequently bypassed
> > this relay, but the coach still won't turn over. Is there
another
> > ignition relay somewhere?
> >
> > Ideas?
> >
> > Thanks,
> > Alan Johnson
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, "Gregory OConnor"
> > wrote:
> > >
> > > Alan, the other half of power supply is ground. Worth a check.
> > > Gregory O'Connor
> > > 94ptRomolandCa
> > >
> > > --- In WanderlodgeForum@yahoogroups.com, "Alan"
> > > wrote:
> > > >
> > > > It seems I am experiencing the classic ZF trans problem of
not
> > > going
> > > > into gear. It has been kind of slow engaging lately and now
> it
> > > > won't move. **One potential variation is that I noticed my
> > > > tachometer does not seem to be registering properly. At
idle,
> > > > sometimes it was reading around 1500 rpm, and sometimes it's
a
> > > > little irratic. (The engine is idling normally.) But I
don't
> > know
> > > > if there is a connection between what my tach registers and
> the
> > > > trans.
> > > >
> > > > So i've read all the posts here I can find about this. I
have
> > > > located my throttle position sensor and it appears to be in
> tact
> > > and
> > > > functioning. I'm now on to the next thing potential problem
> and
> > > > that is a the low voltage problem. I have also found the fix
> in
> > > the
> > > > database. The fix says to check the voltage and find the ZF
> > power
> > > > supply. I've found what appears to be ZF control module. It
> is
> > > > located underneath the push button gear selectors behind a
> > panel.
> > > > It has a large connector on top of it with lots of wires
going
> > into
> > > > it. I HAVE NOT found what might be the power supply.
> > > >
> > > > So I've got a couple of questions if any one has experience
> with
> > > > this:
> > > >
> > > > 1. Where might I look for this power supply. (What does it
> look
> > > > like?)
> > > > 2. When I find it, I can use a Fluke, so I am anticipating no
> > real
> > > > problems in getting to checking voltage..?? Yes?
> > > > 3. If I do find a problem with the power supply, the fix
> > instructs
> > > > me to "retrofit a new power supply". Is this something I can
> > get
> > > > from BB or ZF?? Or something I can pick up at Napa??
> > > >
> > > > Thanks in advance,
> > > > Alan Johnson
> > > > 87FC35
> > > > Dallas, TX
> > > >
> > >
> >
>