Mark, the problem was that hidden relay, I pulled it
and no mor fan problem. I ordered a new one on Tuesday
and on the way home the coolant level sensor blew out
of the expansion tank! I patched it together by
wedging the remnant in place with a socket wrench.
Picked up a new one the next day with the relay, also
a new exp. tank cap and radiator fan switch/sensor
plus a new gauge sending unit. After installation of
the level sensor and cap, the temp doesn't go up to
where it used to, which wasn't high. I'll try the
relay when I get back from vacation. I'm thinking
about using the gauge sending unit as a pattern for an
adapter (turned aluminum or brass)for a real water
temp gauge, anyone ever done that?
Thanks for all the help
Dave

--- mark drillock <drillock@earthlink.net> wrote:
> The fan does not need the key to be on for it to
> run.  The problem may
> lie with the hidden relay for high speed.
> There is a wire right from the battery to that
> relay. A separate large
> red wire just for high speed fan. You could reach
> under the dash and cut
> every wire from the fuse/relay panel and the high
> speed fan relay would
> still be connected to the battery.
>
> Mark
>
> David Hally wrote:
>
> >OK Mark, I under stand what's supposed to happen,
> But
> >in each of the 4 cases you listed below, I have at
> >least one component disconnected or OFF. INCLUDING
> THE
> >IGNITION SWITCH. I have added a comments to your
> post
> >below: (my AC is inoperative right now (bad
> >compressor)and I don't turn it on.)
> >
> >
> >
> >>On 86+ models with A/C the radiator temp switches
> >>only connect to speeds
> >>1 and 3 (low and high). Speed 2 (medium) is turned
> >>on and off only by
> >>the A/C system when it thinks it is needed or not
> >>needed by the A/C.
> >>Pulling relay #5 disables speed 2.( Never do this
> >>and then run the A/C
> >>for long)
> >>
> >>speed 1 - turned on/off by radiator temp switch
> low
> >>side
> >>
> >>
> >****SWITCH WIRES ARE DISCONNECTED****
> >
> >
> >>(switch
> >>provides current to fan resistor, then fan)
> >>
> >>
> >
> >
> >
> >>speed 1 - turned on/off by A/C control panel
> on/off
> >>switch
> >>
> >>
> >****AC SWITCH TURNED OFF****
> >
> >
> >>(switch
> >>provides current to fan resistor, then to fan)
> >>
> >>
> >
> >
> >
> >>speed 2 - turned on/off by A/C refrigerant high
> >>pressure switch  (switch
> >>controls relay #5,
> >>
> >>
> >**** RELAY #5 IS PULLED****
> >
> >
> >>relay provides current to fan
> >>resistor, then to fan)
> >>
> >>
> >
> >
> >
> >>speed 3 - turned on/off by radiator temp switch
> high
> >>side
> >>
> >>
> >**** SWITCH WIRES ARE DISCONNECTED****
> >
> >
> >>(switch
> >>controls hidden dash relay, relay supplies high
> >>current direct to fan)
> >>
> >>
> >****ALSO THE FUSE (#1, 30A) IS PULLED****
> >
> >
> >>The Bentley "main" wiring diagrams are wrong for
> A/C
> >>models in the
> >>radiator cooling areas. You must look at the
> Bentley
> >>A/C wiring diagrams
> >>for your year to see the differences..
> >>
> >>Mark
> >>
> >>
> >>
> >
> >
> >
> >
>