S2000 L4-1997cc 2.0L DOHC (VTEC) MFI (2001)
Blower Motor: Description and Operation
How the Circuit Works
Blower Controls
The blower motor is controlled by the heater control panel which receives battery voltage at all times through fuse 25. With the ignition switch ON (II)
and the engine not cranking, battery voltage is supplied to the control panel through fuse 20. The control panel is grounded at G402.
Battery voltage is applied through fuse 56 to the blower motor relay contacts at all times. With the ignition switch ON (II) and the engine not cranking,
the blower motor relay in the main under-hood fuse / relay box is energized which feeds battery voltage to the blower motor. The blower power transistor
controls the blower motor in all speeds except HIGH. The blower power transistor is controlled by the heater control panel. When the control panel
requests HIGH blower speed, it grounds the blower motor through a resistor built-into the blower power transistor, making the blower run at high speed.