What Causes the Failure of Up and Down Adjustment of Rearview Mirrors?
2 Answers
The failure of up and down adjustment of rearview mirrors may be due to poor contact of the adjustment knob or loosening of the internal retaining spring. It is recommended to visit a local 4S store for inspection and repair. Here is some additional information: 1. Proper adjustment of the left rearview mirror: The safest position for the left rearview mirror is to place the horizon at the centerline of the mirror, then adjust the edge of the vehicle to occupy one-fourth of the mirror's image. 2. Proper adjustment of the right rearview mirror: The safest position for the right rearview mirror is to place the horizon at two-thirds of the mirror's height, then adjust the edge of the vehicle to occupy one-fourth of the mirror's image.
As a seasoned driver with over a decade of experience, I've encountered numerous cases of malfunctioning rearview mirror tilt adjustment. The main causes include damaged switch buttons, burnt-out motors, or loose wiring connections. Switch buttons can wear out or get water damage over time, leading to poor contact and unresponsiveness when pressed. The internal motor responsible for the up-down movement of the mirror can burn out due to aging or overuse - you might hear a buzzing sound but see no movement when adjusting. Wiring issues are also common, such as loose plugs or broken wires that interrupt the electrical current. Additionally, a blown fuse could be another potential factor, though other functions may still work normally. In such cases, I recommend first checking the buttons and wiring connections. If that doesn't work, visit a repair shop to replace the faulty parts. After all, not being able to adjust your rearview mirror tilt significantly affects visibility while driving - safety always comes first.
