scottyb,
If you ground a wire to the "coolant fan temperature switch"....Dk Green w/ Yellow stripe the fan will run with the ignition off. The fan delay relay will determine how long it runs....mine will run for about 12 minutes after I flip the switch.
If your fan relays are all OK, this is how it is "supposed" to work.
The coolant fan temp switch is the sensor on the intake manifold. If this switch gets too hot (I think around 215) the sensor will act like a ground and the fan delay relay will turn on the fan. This is what happens on a hot day when your fan turns on after you turned off the car.
By tapping into this wire...running it to one side of the switch...and grounding the other side of the switch you "trick" the relay into thinking that the sensor is too hot and the fan will turn on.
Hopefully that all made sense.
Good Luck,
John