Update on ZF trouble 87FC35

[Alan]

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
>