Chery QQ Service Manual BCM Computer Control System
Connect the positive probe of the Voltage meter to positive terminal of the defroster,
negative probe to the earth end. Press the positive probe on the hot wire and move it to
the negative terminal. If the voltage springs from 0V to some V at some point, this point
is the broken point, as shown in the figure. If the defroster wiring is not broken, at the
positive terminal of the defroster wiring the volt meter shows 0V, and during the probe
move to the other terminal, the voltage increases gradually to 12V.
Detection of the broken point of the defroster wiring
3、Repairing of the defroster wiring
Eliminate the tool cleaning broken point with lubricating grease (wax) and organosilicon,
during the repairing, attach adhesive tape on the both side of the defroster wiring. After
mixing of the repairing agent, drop the repairing agent to the broken point in appropriate
amount with electric brush. Remove the adhesive tape after few minutes, as shown in the
figure
Repairing of the defroster wiring
Ⅳ. Inspection and Repair of Control System of Power Windows
1. Operating mode of power windows
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