Brightness Mode There are six stages of brightness for both daytime and nighttime available for users to select the preferred brightness. 1) Hold < ▲ > for 3-second to enter to the backlight brightness mode. When the PK and WR LED are flashing, the daytime brightness can be selected. 2) Press either < ▲ > or < ▼ > to select the backlight brightness. 3) In order to set the nighttime backlight brightness, the orange wire of the power wire harness should be connected to a headlight 12v switched source (+). 4) When the headlight 12v switched source (+) is on, the nighttime brightness can be selected. 5) Press < M > or after 5-second of no button activity, the gauge will return to the normal mode
Do you not have this feature programming?