The inside rearview mirror (Day/Night) uses 2 photocell sensors in order to determine the light conditions in the front and the back of the vehicle. With the mirror switched OFF, the mirror is in a clear state.

The mirror receives voltage from the HVAC Fuse in the fuse block through circuit 41. Ground is supplied through circuit 850 from G402. With the switch pressed to ON, the backlight of the switch turns ON. In the daytime, the mirror is in a clear state. At night, the mirror remains in a clear state until the glare of headlamps from behind increases to a point that exceeds the preset sensitivity of the mirror. The mirror then gradually becomes darker in order to absorb the glare. The mirror remains dark until the glare of the headlamps diminish. The mirror then returns to a clear state.

When the gear select lever is in the REVERSE position, voltage is sent through circuit 24 to the mirror. If the mirror is in the darkened state, the input causes the mirror to change to a clear state regardless of any glare. When the gear select lever is taken out of REVERSE, the mirror returns to normal operation.

The RH, LH outside mirror also has glare reduction dimming that is controlled by the interior mirror. The tint level voltage (0 -- 1.2V) is supplied to the RH, LH outside mirror via circuit 1690 and circuit 1691. The RH, LH outside mirror darkens or clears along with the interior mirror.