Cherokee 4WD L6-4.0L VIN S (1998)
Four-Wheel Drive (4WD) Indicator Lamp: Description and Operation
SYSTEM OPERATION
Part Time
On vehicles with the optional Command-Trac four-wheel drive system, the Part Time indicator lamp lights when the transfer case is engaged in the
4H or 4L positions. On vehicles with the optional Select-Trac four-wheel drive system, the Part Time indicator lamp lights when the transfer case
is engaged in the 4 X 4 Part Time or 4 Lo positions.
When the ignition switch is in the On position, battery voltage is supplied to one side of the indicator lamp bulb. A normally-open, plunger-type,
four-wheel drive switch threaded into the transfer case is hard- wired in series between the other side of the indicator lamp bulb and ground. 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.
Full Time
The Full Time indicator lamp is only operational on vehicles equipped with the optional Select-Trac four-wheel drive system. The Full Time
indicator lamp lights when the transfer case is engaged in the 4 X 4 Full Time position.
When the ignition switch is in the On position, battery voltage is supplied to one side of the indicator lamp bulb. A normally-open, plunger-type,
four-wheel drive switch threaded into the transfer case is hard-wired in series between the other side of the indicator lamp bulb and ground. 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 Full time indicator lamp bulb to light.
