BOB·半岛

Common faults in electric windshield wiper systems include the wipers not working and the wiper blades not resetting. The maintenance method is as follows. ① Before troubleshooting the windshield wiper system, it is necessary to determine whether it is an electrical or mechanical fault. The simplest way to determine this is to remove the mechanical arm connected to the wiper blade from the motor, turn on the wiper system, and observe the operation of the motor. If the motor is working properly, it indicates a mechanical problem; otherwise, it indicates a malfunction in the electrical system. ② Most circuit faults that cause slow wiper action are caused by high contact resistance. If the fault manifests as all speed gears being slow, the circuit between the power supply and the wiper switch should be checked, mainly to ensure that the intermediate relay, fuse, and wiper switch connection wire terminals are firmly and reliably plugged in. ③ If the wiper system only works abnormally in intermittent mode, the first thing to check is whether the grounding of the intermittent relay is good. If the grounding is normal, use an ohmmeter to check the circuit between the relay and the wiper switch; If the connection line is also good, the intermittent relay should be replaced. ④ The fault that causes the wiper to fail to reset may be due to the reset switch or the deformation of the contact plate inside the wiper switch. The reset switch or wiper switch should be replaced.