Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
You will have power at the blower motor when the key is on. When you select the blower speed, it will be grounded by the switch, through the blower resistor.
If you are only getting a dim light at one wire, (at the switch) then you will want to check the resistor.
The front blower motor resistor is mounted to the inboard side of the heater-A/C housing in the engine compartment. It is held in by 2 small screws, (7mm I think) and you might see the problem if you take it out. The coil inside may have come apart.
You might want to check the voltage, (power) at the blower motor to see. There should be power all the time, (when the key is on) on the dark blue wire and the light green and white wire should be grounded. That should make the blower come on if it is good.
You can test it with a test light and see if it will light when you go from the one wire to the other.
Oh, sorry. Right at the blower motor under the hood. I can't get any pictures to copy. I did manage to get this one, see if that helps
View of the heater & A/C housing (1), mounting screws (2), connector (3), blower motor (4), cooling tube (5), blower housing cover (6) and rubber seal (7)