HUD Image Intensity Control

Ignition voltage is applied to one side of a variable resistor in the Head-UP Display (HUD) control switch. Moving the HUD control switch to ON applies voltage from the wiper of the variable resistor to terminal 7 of the HUD control switch. Moving the HUD control switch from DIM to BRIGHT varies the voltage applied on CKT 717 (WHT) to the display intensity input at terminal 3 of the HUD control module.