I need HELP please on my 90!

[randrews@post.cis.smu.edu (Robert Paul Andrews)]

OK guys, I really need some help. My radiator fan isn't kicking on
at all.  I tested the wires going to the thermo switch and 2 are getting
power.  (How much should they be gettin?)  And the other one is ground I
assume so no power.  I tested the resistor on the fan itself and found
nothing.  The red/blue wire had no power on it.  I don't know what else
to say.  It never runs, after run, or anything. HELP!  Please!
THanks
Rob
randrews@post.smu.edu