F 150 4WD Pickup V8-5.4L SOHC VIN 3 (1999)
Four Wheel Drive Indicator Lamp: Description and Operation
4X4 High Indicator
The 4X4 high indicator will be illuminated when the vehicle is in 4X4 high mode and the GEM sends a ground signal to the instrument cluster. The 4X4
high indicator will prove out when the ignition switch is placed in the START position and then in the RUN position.
