Blower In Pushbutton Positions A, B, C and D Without Function

COMPLAINT:
Blower in pushbutton positions a, b, c and d without function.

Cause/Remedy:
a) Fuse blown.
Renew fuse, eliminate short.
b) Voltage supply to blower motor interrupted.
Eliminate interruption (cable coupling or harness).
c) Blower motor defective.
Check by direct connection to battery, renew motor, if required.
d) Electronic switching unit for blower control defective.






Renew switching unit (19).
e) Blower switch or control unit defective. Renew blower switch, renew control unit, if required.






f) Resistor group (12) defective. Renew resistor group.