What are the reasons for the malfunction of the rearview mirror adjustment button?
2 Answers
Here are the reasons and solutions for the malfunction of the rearview mirror adjustment button: 1. Poor button contact: The adjustment button does not work in the up, down, left, or right directions. Solution: Go directly to an auto repair shop or 4S store and have professionals clean it. 2. Misalignment of the white screw inside the mirror: The phenomenon is that when adjusting, the motor has a working sound and is in a working state, but the adjustment fails. Solution: Insert the white screw into the rubber sleeve. The mirror can be directly pulled off. Apply force from the bottom of the mirror, upwards and outwards. The middle of the mirror is a large spherical slot. Pull it open to see the white screw. 3. Damage to the motor gear or problems with the wiring harness. Solution: Go to a 4S store or auto repair shop and have professionals inspect it first to determine the problem, then repair it accordingly.
There are several common reasons why the rearview mirror adjustment button may malfunction. The button itself can develop issues over time, with internal contacts wearing out or aging, resulting in no response when pressed. Poor wiring connections are another possibility, especially in the wiring harness at the door-to-body junction, which is prone to bending and breaking. My car once had this issue—after disassembly, I found the wires were broken. Another scenario is moisture or dirt getting into the button, such as water seeping in during car washing and not drying properly. A blown fuse is also common, possibly due to a short circuit or unstable voltage. If the motor inside the rearview mirror is damaged, the button won't work either—whether the motor is stuck or burnt out. If you encounter this problem, you can check the fuse yourself as a simple fix, but for other cases, it's best to have a professional mechanic inspect the wiring for proper repair.
