Post by
1991S13 »
https://forums.nicoclub.com/1991s13-u22320.html
Fri Apr 29, 2005 5:56 pm
SEARCH, and more often than not you will find the answer to your question.
I searched and found this: There is a HVAC resistor under the glove box next to the blower motor. What this does is limits the amount of electricity going to fan speeds 1, 2 and 3; and 4 is direct current. Yours is broken, so you need to replace it. I even found a picture of it when I searched...
To find it follow the 4-wire harness that's tied into the 2-wire harness that goes into the blower motor.