5000CS Turbo L5-2226cc 2.22L SOHC Turbo (MC) (1987)
Control Module HVAC: Testing and Inspection
Fan Control Module
To check the blower control unit:
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Remove electrical connector from control head panel
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Turn ignition "ON".
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Check for power at terminal 1 of blower control unit.
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Check for ground at terminal 5 of blower control unit.
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Connect test light between terminals 1 and 6. (Do not use a jumper wire).
^
blower motor should run.
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Connect test light between terminals 5 and 6.
^
blower should not run. If blower runs, replace blower control.
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Remove connector from blower control unit and connect wires on connector from terminals 1 and 6 with jumper wire.
^
blower motor should run. If not, replace blower motor.
Terminal
Function
1
12V (Terminal 15) with ignition on from fuse 17
3
Power output to blower
5
Ground
6
Input signal from control panel head used to activate and control blower motor speed. Voltage ranges from approximately 2
volts in LO fan speed to 6 volts in HI fan speed.