B4000 2WD V6-4.0L SOHC (2003)
PINPOINT TEST "A" MIRROR FACE DOES NOT DIM
The forward facing sensor detects ambient light. This is to determine day or night time. This sensor will dim the mirror during night driving.
WARNING:
The forward sensor dims in proportion to how dark it is. If the forward sensor is covered entirely, the mirror defaults to its darkest setting.
The rear facing sensor detects light coming from vehicle headlights from behind. The rear facing sensor is used to darken the mirror further when
headlights are detected.
PINPOINT TEST "B" MIRROR FACE IS ALWAYS DIM