Wrangler 4WD L4-150 2.5L VIN P MFI (1998)
Four-Wheel Drive (4WD) Indicator Lamp: Description and Operation
SYSTEM OPERATION
The Part Time four-wheel drive indicator lamp lights when the transfer case is engaged in the 4H or 4L positions. A normally-open, plunger-type,
four-wheel drive switch is threaded into the transfer case and is hard-wired in series between the indicator lamp bulb and ground.
When the ignition switch is in the On position, battery voltage is supplied to the other side of the indicator lamp bulb. When the transfer case is
shifted into the proper position, the plunger of the four-wheel drive switch is moved, closing the switch and providing a path to ground. This
causes the Part Time indicator lamp bulb to light.
