Chery QQ Service Manual BCM Computer Control System
Figure Inspection of wiper and washer switches
（5）Inspection of the operation of the front washer
As shown in the figure, the terminals 8 and 5 are respectively connected to the positive
and negative pole (anode and cathode) of the secondary cell, and the positive and
negative probes of a voltmeter are respectively connected to the terminals 7 and 5. Turn
on the washer switch, check up if the voltage changes as follows: after the washer switch
was turned on for one second, the volt meter displays the supply voltage, and after
turning off for 3 seconds, 0 voltage is displayed. If it is not the case, the wiper and
washer switch should be replaced.
Figure Inspection of the operation of the front washer
（6）Inspection of the performance of the front wiper motor
The circuit arrangement is shown in the figure. Inspect the low speed performance of the
front wiper motor, and replace it if necessary. It should be noted that the inspection
should be accomplished as soon as possible, in order to prevent overheat (overburning)
of the motor.
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