The electric rear view mirrors utilize two motors for adjustments, One of them is used for the vertical movement and the other one for the horizontal movement, with some of the models housing a heating component to resolve the defogging of the windscreen. It has a selector for switching the voltage to either the left or the right mirror in the case of the control switch. With the ignition in the ACC position, windows should be rolled down and then through the mirror control switch the functions of both the mirrors should be tried for the sound of the motors. If the motors are easy to hear but the glass is not moving, then it is more than certain that the drive system has to be replaced. Otherwise if the mirrors make no sound, it is important to examine the
Fuse in the fuse block. If the fuse is good, with the ignition ON, remove the door panel but do not disconnect any of the wires needed in diagnosing the 2005 mirror control switch get voltage at the switch. When voltage is available, the switch has to be checked for continuity in all positions and, if it does not have continuity, it has to be replaced. After reconnecting the switch a jumper wire can be used to check if ground is connected or not. If no response is passed from the mirror the mirror should be disconnected to test for the presence of voltage in the wired while turning the switch in various positions. When there is a lack of voltage, problems may lie in the wiring between the mirror and control switch; when voltage is present, the mirror must be tested off of the vehicle with jumper wires and must be replaced if it does not function. The day night mirror that automatically adjusts the placement of light diminishes them through frosted glass with the use of two photocell sensors in controlling an electrochromic material. On non sunroof or sunroof models, the mirror switch should be set correctly, while the ignition is on. Instead, testing is conducted by casting light onto the front sensor and making sure that the glass turns dark, and when the car is put in reverse, the glass should lighten. In case it fails any tests the mirror should be replaced.