Update on ZF trouble 87FC35

[pattypape]

Hi Alan,

Do you have the ZF Operating instruction Book?? It is a small
Blue book about 6" x 8" . There is a procedure to manually
shift a lever on the Trans into forward or reverse. This may help
get the bus off of the road. I have not had the opportunity to try
this, nor do I have this experience .

You may want to check the neutral switch under the push button panel.
I believe there is a manual switch or linkage there. The ZF may be
looking for the Neutral button to engage.
I also think that 12v modification Bosh 30 amp. relay, is at the
base of the left side carpeted panel far forward, just hanging by
the wires.
There are two side by side Bosch 30 amp relays mounted forward of
your left foot, these are the headlight relays.
The two relays accessed from the front panel, forward of the
throttle & brake pedals, these are the driving light relays.

I do not know about those silver boxes. They could be turn
signal/hazard light junction boxes. Lots of wires in there.

Hope this helps,

Bill 88 FC





--- In WanderlodgeForum@yahoogroups.com, "Alan"
wrote:
>
> One more thought. I re-looked at the "fix" on the web site for a
> low-voltage problem. I don't think i've ever found that 12 volt
> relay for the ZF. I found the 75amp one, but this appears to be
> another one. ZF wire #19 is nearly impossible to trace. best i
can
> tell, it goes under the coach and off into oblivion. ...But my
> common sense tells me I'm missing that relay and it's probably
> someplace accessible, I just don't know which one it is. ANY
IDEAS
> ON WHERE THIS RELAY IS?? I'm betting at least 50/50 this is still
> my problem.
>
> Ernie, mine has the push-button gear selector.
>
> Bill, your suggestion about checking the barrel connectors was
good
> too. I had a problem there too. I'm not sure how these problems
> are related, but probably somehow. I had a melted pin in one of
the
> connectors. It was the 12v supply to the ignition switch. I'm
> suspecting it had been going bad with corrosion, and somehow all
> my "trouble shooting" was the end of it. I corrected that problem.
>
> Thank,
> Alan
>
>
> --- In WanderlodgeForum@yahoogroups.com, "Alan"
> wrote:
> >
> > Well, after many hours this is where I currently am.
> >
> > 1. I have zero volts going to my ZF ECU.
> > 2. The coach won't start. Now I'm pretty sure that's because
> > without voltage to my ECU, the coach doesn't know if it's in
gear
> or
> > not. (I can jump my starter solenoid and it starts.)
> > 3. I talked to Dan at ZF in Chicago and he was quite helpful.
He
> > told me how to check voltage on the ZF. BUT he didn't know where
> the
> > ZF gets it's power off the coach.
> > 4. I am getting volts out of my 75amp ignition relay with the
key
> > turned on.
> >
> > There are bunches of ZF wires behind the grill in the steering
> > column access panel. There are also two silver boxes with what
> are
> > apparently ZF wires going in and out of them. The boxes are
about
> > 4" x 4" x 1". However, I know these aren't the ZF ECU. It is
> > located underneath the push-button gear selectors by the driver.
I
> > don't know if they have anything to do with power.
> >
> > Questions (If anyone knows):
> > 1. Where/how does the ZF get power from the coach?
> > 2. Does the power go through the filtered power source under the
> > couch?
> > 3. What would keep me from getting any power to the ECU?
> >
> > Tomorrow I'm ordering a full set of electronic drawings, but in
> the
> > mean time my neighbors would appreciate it if I can get the
coach
> > moved from the street.
> >
> > Thanks,
> > Alan Johnson
> > 972.769.2526
> > 87FC35
> >
>