Classic ZF trouble..?? 87FC35

[Alan]

Bob,

I agree about finding out why I'm only getting 7.5vdc. Here are a
couple of other thing I know.
1. I've got 12v on my batteries (charged new t105s)
2. I've got 12v on my non-ignition circuits. ...so far I've just
found the one set of breakers on my lower front breaker panel that
are on the 75amp relay coming off the ignition.
3. I by-passed that relay and now i'm getting 12v to that set of
breakers.
4. The coach still won't start. I have checked the "normal"
stuff. ...Neutral, a/t switch, 12v coach switch.

All this and nothing at all happens when I turn the ignition key.
Is there another relay somewhere other than the 75amp one I found??
Also, there are two wires coming into that relay that should
activate it. I'm not sure I'm getting power to those. Do those
come directly off the ignition switch or perhaps another relay??

Thanks for your ideas!!
Alan Johnson



--- In WanderlodgeForum@yahoogroups.com, "one_dusty_hoot"
wrote:
>
> 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
> > > > >
> > > >
> > >
> >
>