Still no luck with cooling fans...
Stewart, Joe (COX-Atlanta)
Joe.Stewart@cox.com
Fri, 26 Jul 2002 15:42:50 -0500
>Maybe the coolant sensor isnt working properly or the temp sensor next
to it.
Bad ECT defaults to the fans being on. This would be both fans, and they
are off when the ECU is off. This would be the high fan setting.
There is a single relay for the AC circuit, which is the low speed fan
setting. It is blue, should be labeled. Swap it with another blue relay.
(I doubt this is it.) It is over by the power steering reservoir.
There is a dual relay for the high speed, both fans, it is by the
battery. It is brownish, should be labeled. Swap it with another brown
one. I think that if you pull the brown relay the fan will stop. Then it
is probably a bad fan relay, or the remote possibility a bad ECU, but
that is odd. Anyway I'll bet it is one side of the brown relay by the
battery sticking. Temporarily swap it with a different brown relay to
check.
The FSM goes over this in great detail and tells you exactly what to
check. Took me 30 minutes with a DVM to test the entire system, start to
finish. Only to find out I had a $3 bad thermostat. :)
-Jay