Horton Fan

[Gregory OConnor]

Sounds like when 12 volts is complete at the 12v/pnumatic clutch
valve it stops air from being sent to the clutch and at the same
time allows the trapped air to exhaust.??? it might be that 12 volts
is always present at the pnumatic valve and the signal is sent via a
ground.

if you were to hook up a bosch relay to read the 12 volts input +
or - that turns the fan off and connect that acting signal to Bosch
terminal 85 you could mount a bulb on the dash and hook its + side
to Bosch 87a. Terminal 87 is not used. Terminal 30 is +12 volts
ignition power.Terminal 86 is powered depending on what signal trips
the pnumatic valve.

you may want to see if the fan override switch gets a signal
backwards when the fan comes on????? that may reduce the need for a
long wire between the dash and valve.

See link below and scrool to the bottom for using positive or
negitive input to power the relay

http://tinyurl.com/5hjxm


GregoryO'Connor
94ptRomolandCa




--- In WanderlodgeForum@yahoogroups.com, "Donald Spithaler"
wrote:
>
> Greg -- Bill
> When you put air to my fan it will lock the clutch. I just had
it
> off & rebuilt a couple of months ago. It was leaking air around the
> hub. I haven't had time to check the solenoid to see which wire is
the
> 12 volt. I want to know when the fan comes on. When it is cold my
temp
> stays at about 175 & when the outside temp goes up it runs around
> 190+or -. When it is warm out side & I stop for a break the fan is
> running & then after a few minuets it cycles off then back on
again. I
> would just like to know if it does that when driving or if it stays
> off longer. The fan would make a difference in you fuel
consumption to
> wouldn't it? When I turn my key off the solenod opens up & lets
air to
> the fan clutch & my fan will stay locked up till the air in the
tanks
> drain down. lf I turn the key back on the will release from the
fan &
> it will spin free. Bill if you figure out a good way to wire it
let
> me know.
> Don Spithaler
> 89 SP 36'
> Butler, PA In Zephyrhills, FL
>
> On Feb 17, 2008 12:27 PM, pattypape wrote:
> >
> >
> >
> >
> >
> >
> > Our 88FC fan is activated by an air electrical 12V solenoid.
> > An indicator light could be attached, but I think you would need
> > at least 70 feet of wire, and probably a relay for voltage.
> > I do not have this schematic, but possibly it could be attached
to
> > the overide switch ??????
> > This is not impossible. And I think a good idea.
> >
> > Bill 88 FC Michigan
> >
> >
> > --- In WanderlodgeForum@yahoogroups.com, "Donald Spithaler"
> > wrote:
> > >
> >
> > > Guys
> > > I would like to know when my fan engages & disengages. Being a
> > > pusher the fan is two far away. How would be a good way to
wire it
> > up.
> > > I would like to have a light come on when it is engaged.
Would the
> > air
> > > solenoid be a good place to tap into the wiring? I would like
to
> > know
> > > at what temp it engages. I can tell it is working when I stop
> > because
> > > it will cycle on & off. How does everyone else know? I hope I
am not
> > > the only one that wanders that.
> > > Don Spithaler
> > > 89 SP 36'
> > > Butler, PA Zephyrhills, FL
> > >
> >
> >
>