280ZX L6-2753cc 2.8L SOHC (L28E) (1982)
Blower Motor: Description and Operation
Automatic Blower Speed
This system includes a blower control rheostat which is operated in conjunction with the air mix door. The rheostat registers a resistance value which
varies with air mix door position. The blower control amplifier measure the resistance value of the blower rheostat and controls blower speed in
proportion to the rheostat value.