rad fan behavior

[Mike Veglia]

I have owned 2 different '85 4kqs (out of the 4 4kqs I have owned). I recall
the radiator fan behavior being different in the two '85s than on the
others. It has been some 5 or so years since I last had an '85 so the
recollection isn't quite a clear any longer, but I recall it would never run
when the engine was off (yet it does on the '86 and '87 I have owned). I'm
pretty sure the '85 was not wired for after run operation (but can't say for
sure). I believe the '85 radiator fan circuit is a rather simple circuit
that relies solely on the radiator mounted fan switch and is only enabled to
be switched on by the fan switch with ignition on. If the fan's behavior is
erratic, I would change the fan switch. Cheap and easy, but plan on changing
coolant and thus any other cooling system parts that are suspect at the same
time.

HTH and good luck.

Mike Veglia
Motor Sport Visions Photography
http://www.motorsportvisions.com