[Shotimes] Cooling Fan Problem - How to troubleshoot?

[Kevin & Cheryl Airth]

Dave:
 Ignore the 542 code. It does not appear to mean anything. Seems to come up
if the car is stalled? Can you swap the relay box under the black plastic on
top of the radiator with another SHO? I think it's only working part time?
Does the fan turn easy or does it drag? Could be pulling too much juice and
has a hard time getting started. When you checked that the fan did not come
on with the A/C, did you check for voltage at the plug at that time? No code
is set if the fan or relay box go bad.
.
.


> Jason, All,
>
> I have finally gotten around to doing some testing on
> my SHO.  I have driven it a little on short trips
> making sure not to over heat.
>
> I unplugged the fan and started the car.  No voltage.
> I turned on the AC MAX and got voltage.  I plugged it
> back in and the fan started working.  I turned the AC
> off and the fan turned off.  Normal behavior at this
> point.  I turned the AC back on to see if it would
> spin up again and nothing.  Tried several more times,
> nothing.
>
> A KOEO test only produces a 111 and 542.  I will have
> to look into the secondary fuel pump circuit later,
> but for now, could that be related to normal fan
> operation?
>
> A KOER test does not spin up the fan and only produces
> a 111 when I turn the steering, brake, and goose
> properly.
>
> Ideas?
>
> Thanks,
>
> Dave
> 93 MTX

> > Well, the easiest way to test the fan is to run the
> > KOEO test... if you
> > don't know how to work the paper clip trick, go out
> > and buy a cheap code
> > scanner for ford cars and run the KOEO test by the
> > directions in the book,
> > the fan should run at both speeds during the tests.
> > If they don't, the code
> > scanner will return codes for an inop fan.
> >
> > Jason
> >

> > > Hey,
> > >
> > > Had an issue yesterday where I got stuck in stop
> > and
> > > go traffic.  The engine temp kept rising, so I
> > pulled
> > > over and let it cool down a bit.  I then got back
> > on
> > > the highway and it cooled back down.  Once back
> > off
> > > the highway it started rising again and I noticed
> > my
> > > cooling fan was not kicking on.  I have checked
> > all
> > > obvious wiring and connections, any suggestions on
> > how
> > > to test the fan before dropping $80 for a new
> > motor?
> > >
> > > Thanks in advance,
> > >
> > > Dave
> > >
> > > 93 MTX - New oil free starter.