How are Door Mirrors diagnosed?
If the problem with a door mirror is related not to damage caused from impact to the mirror or mirror housing, but rather to a fault in the system, a technician will use a multimeter to make sure that the mirror and the mirror switch are getting power. It may be necessary to check the individual circuits for each function in the mirror. In some cases, a technician will use a special scan tool to check the electronic control unit for proper operation.
How are Door Mirrors replaced?
If the mirror, mirror housing, or motor are found to be faulty and the mirror assembly needs to be replaced, the technician will remove the interior door trim panel (in most cases) to access the mirror wiring and the attachment fasteners. With the panel carefully removed, the technician will unplug the mirror's wire connector from the door wiring harness, remove the fasteners that secure the mirror, and remove the mirror from its mounting location. The new mirror is put in place, the fasteners attached, and the wire connector plugged in. The door trim panel is reinstalled and the mirror is tested for proper operation.
RepairPal Recommendations for Door Mirror issues
RepairPal recommends that, if a DIY door mirror replacement is to be considered, all of the mirror options (power, heat, etc.) be identical between the original mirror and the replacement mirror. This is especially important if the vehicle includes an electronic control module that will coordinate the mirror function.
What to look out for when dealing with Door Mirror issues
It should be noted that many interior door trim panels are difficult to remove, and may contain one-time-use fasteners that need to be replaced when the trim panel is reinstalled. The wires and cables connected to the trim panel may be easily damaged. Some vehicles also incorporate airbags into the door panel. Care must be exercised when working around these airbag modules and wiring. Many door mirrors are color coordinated to the vehicle body paint. It may be necessary to have a new replacement mirror painted to match the rest of the vehicle prior to installation.
Can I replace the Door Mirror myself?
Many door mirrors can be replaced by someone with intermediate DIY experience. The interior door trim panel can be challenging to remove on some vehicles. Vehicle-specific repair procedures should be accessed to prevent damage to sensitive wires, clips, and cables on the inside of the trim panel.