The 2003 Lexus ES300 air conditioning control assembly controls the blower speed by varying the voltage at terminal BLW which applies the base current to the power transistor. The air conditioning control assembly also monitors the power transistor collector voltage at terminal, VM to control blower air volume precisely. The following schematic shows the 2003 Lexus ES300 Power Transistor circuit and wiring diagram. The system composed of heater main relay, blower motor, extra-hi relay, lo resistor, A/C control assembly. (click image to enlarge)
2003 Lexus ES300 Power Transistor Circuit
November 5th, 2009
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Subaru Impreza WRX STi Compass Mirror Wiring Diagram | Schematic
November 2nd, 2009
The following file contains detail schematic and wiring diagram of 2004 Subaru Impreza WRX STi Compass Mirror system. The compass mirror system is connected to inhibitor switch, power supply routing, back-up light switch and ground system. (click image to enlarge)
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