In a message dated 10/22/1999 10:29:13 AM Eastern Daylight Time,
ron@netcarrier.com writes:

<< Unless I'm mistaken, fan should also kick into low-speed immediately when
 you turn on your air conditioning (if you have it), regardless of engine
 temp.  I have also found that idling the van for a while with the A/C
 running is the most likely (but not definate) way to cause the high-speed
 setting to engage for testing purposes. >>

You are correct that you could test the actual fan itself this way, but the
A/C fan switching system and the radiator fan switching system are really two
different beasts.

Radiator fan test that I gave would allow you to know if your fan was coming
on and working properly in response to coolant temps.

The radiator fan test for the A/C system really only has to do with
refrigerant pressures, etc making the fan come on at low and high speeds
according to the refrigerant pressures in the system.  Really a whole other
system and a whole other troubleshooting chart.

Just don't want to confuse people.  In simple terms your A/C system could be
turning your fan on at both speeds and your coolant temp sender could still
be bad and not allowing the fan to come on at the proper temps during normal
operation.

Hope this helps clear things up,
Ken Wilford
http://www.vanagain.com
John 3:16
Phone: (856)-765-1583
Shop:   (856)-327-0027
Fax:     (856)-327-2242