Nissan Repair: !985 Nissan Sentra Blower Motor, nissan sentra, blower motor

Question
Blower Motor will not work. Blows fuse. Motor works hooked up to battery. Put in new resistor. Verified switch is OK inside.
Unwrapped wires look OK
Is there a relay under the dash that would cause the fuse to blow if it went bad. I just found three relays above and to the right of the steering column. There is also a circuit board that is part of the wiring of the heater control in the housing above the heater core.
I do not know what to do now. My book is very elemantary, Please, help

Answer
Tom,

If the blower motor works and you have changed the resistor block then I would be looking at the blower switch for a short or the relay.  You are on the right track so the relay goes for aobut $20 bucks and if it were me I would be going to the wrecking yard for the switch since Nissan wants something like $100 bucks for the assembly.