I'm no wiz with on it either.
I'll walk you through it. First of all, be careful-you are standing next to the fan and it can take a finger off pretty easy, work from one side or the other. Put th ebrake on also.

Slightly loosen the wiring connection to the valve. Insert the probes from your meter so that one touches one pin one the other. Alligator clips work the best. Set you meter to DC scale 200 I think. Start the car. If your meter reads negative, reverse the leads. Should should get a reading around 4 volts. That's what mine reads. If it's not reading anything, make sure the leads are touchingn the valve but not each other.

Report back your results.

JBoggs