i had a similar problem with an escort, the fan never came on, however if i
pulled toe fuel pump fuse it would come on all of a sudden, dunno why.
 
rather than spend hours tracing wires i just found a fuse that powered on when
the key was in the on position and ran a wire directly to the fan, it ran all
the time the car was running and went off when i turned the key off.  weird side
effect though, when i turned the key off the engine would run for 3 seconds then
turn off, without the key even in the ignition.
 


--- On Tue, 7/7/09, flash_johnson2003 <whoisco@...> wrote:


From: flash_johnson2003 <whoisco@...>
Subject: [Jeep Comanche] Cooling fan relay
To: jeepcomanche@yahoogroups.com
Date: Tuesday, July 7, 2009, 11:20 AM








HI, my 87; 4.0 electric cooling fan does not come on when I am stuck in traffic.
It works just fine when I turn on the A/C. I have replaceed the sensor in the
radiator, that come out about have way up the driver side. I think there is
another relay somewhere, to tell it when to come on? Any help? THanks. ( I tried
the Jeep Forum site, and can't figure out how to use it)



















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