The fans will not turn on when you first start the car, nor after you shut it off. The temperature gauges are quite inaccurate, too. With normal driving, in particular at 50 MPH, they may not come on. Try doing your normal driving, get the engine up to normal operating temperature, and then let it sit and idle for a while. They should come on at least on low speed then. Once your A/C is up and running, they should come on when you turn that on.
If you want a lower temperature for the fans to kick on, and for them to run for a short time after shutting off the car, you'll need an after-market PCM, or yours reprogrammed, like Intense offers.
Black 2000 SSEi, Silverstar Headlights, Angel Eyes fogs, 3rd brake light overlay, hi-flo cat, drilled 180 degree thermostat, Intense FWI, PCM, shift kit, and 3.4 Pulley. Solid front mount.