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TJ
SEATBELT WARNING
INDICATOR
DESCRIPTION
A seatbelt indicator is standard equipment on all
instrument clusters. The seatbelt indicator is located
near the center of the instrument cluster overlay,
directly below the high beam indicator and above the
odometer/trip odometer Vacuum Fluorescent Display
(VFD). The seatbelt indicator consists of a stencil-like
cutout of the International Control and Display Sym-
bol icon for "Seat Belt" in the opaque layer of the
instrument cluster overlay. The dark outer layer of
the overlay prevents the indicator from being clearly
visible when it is not illuminated. A red lens behind
the cutout in the opaque layer of the overlay causes
the icon to appear in red through the translucent
outer layer of the overlay when the indicator is illu-
minated from behind by a Light Emitting Diode
(LED) soldered onto the instrument cluster electronic
circuit board. The seatbelt indicator is serviced as a
unit with the instrument cluster.
OPERATION
The seatbelt indicator gives an indication to the
vehicle operator of the status of the driver side front
seatbelt. This indicator is controlled by a transistor
on the instrument cluster electronic circuit board
based upon cluster programming and a hard wired
input from the seatbelt switch in the driver side front
seatbelt buckle unit through the seat belt indicator
driver circuit. The seatbelt indicator Light Emitting
Diode (LED) receives battery current on the instru-
ment cluster electronic circuit board through the
fused ignition switch output (run-start) circuit when-
ever the ignition switch is in the On or Start posi-
tions; therefore, the indicator will always be off when
the ignition switch is in any position except On or
Start. The LED only illuminates when it is provided
a path to ground by the instrument cluster transis-
tor. The instrument cluster will turn on the seatbelt
indicator for the following reasons:
• Seatbelt Reminder Function - Each time the
cluster receives a battery current input on the fused
ignition switch output (run-start) circuit, the indica-
tor will be illuminated as a seatbelt reminder for
about seven seconds, or until the ignition switch is
turned to the Off position, whichever occurs first.
This reminder function will occur regardless of the
status of the seatbelt switch input to the cluster.
• Driver Side Front Seatbelt Not Buckled -
Following the seatbelt reminder function, each time
the cluster detects a ground on the seat belt switch
sense circuit (seatbelt switch closed = seatbelt
unbuckled) with the ignition switch in the Start or
2001 JEEP WRANGLER
On positions, the seatbelt indicator will be illumi-
nated. The seatbelt indicator remains illuminated
until the seat belt switch sense input to the cluster is
an open circuit (seatbelt switch open = seatbelt buck-
led), or until the ignition switch is turned to the Off
position, whichever occurs first.
• Actuator Test - Each time the cluster is put
through the actuator test, the seatbelt indicator will
be turned on, then off again during the bulb check
portion of the test to confirm the functionality of the
LED and the cluster control circuitry.
The seatbelt switch is connected in series between
ground and the seat belt switch sense input to the
instrument cluster. The seatbelt switch input to the
instrument cluster circuitry can be diagnosed using
conventional diagnostic tools and methods. For fur-
ther diagnosis of the seatbelt indicator or the instru-
ment cluster circuitry that controls the LED, (Refer
to 8 - ELECTRICAL/INSTRUMENT CLUSTER -
DIAGNOSIS AND TESTING).
SHIFT INDICATOR (TRANSFER
CASE)
DESCRIPTION - PART TIME INDICATOR
A part time indicator is standard equipment on all
instrument clusters. The part time indicator is
located near the upper edge of the instrument cluster
overlay, in the upper right quadrant of the cluster.
The part time indicator consists of a stencil-like cut-
out of the words "PART TIME" in the opaque layer of
the instrument cluster overlay. The dark outer layer
of the overlay prevents the indicator from being
clearly visible when it is not illuminated. An amber
lens behind the cutout in the opaque layer of the
overlay causes the "PART TIME" text to appear in
amber through the translucent outer layer of the
overlay when it is illuminated from behind by a
Light Emitting Diode (LED) soldered onto the instru-
ment cluster electronic circuit board. When the exte-
rior lighting is turned On, the illumination intensity
of the part time indicator is one-step dimmable,
which is adjusted using the panel lamps dimmer con-
trol ring on the left multi-function switch control
stalk. The part time indicator is serviced as a unit
with the instrument cluster.
DESCRIPTION - FULL TIME INDICATOR
A full time indicator is standard equipment on all
instrument clusters, but is only functional on vehi-
cles in some markets where the Selec-Trac four-wheel
drive system is an available option. The full time
indicator is located near the upper edge of the instru-
ment cluster overlay, in the upper right quadrant of
the cluster. The full time indicator consists of a sten-
INSTRUMENT CLUSTER
8Js - 29
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