Jeep Wrangler 1997 Manual page 315

TJ
DIAGNOSIS AND TESTING (Continued)
(1) Disconnect and isolate the battery negative
cable. Remove the cluster bezel and the cluster
assembly as described in this group .
(2) Connect the battery negative cable and turn
the park lamps on with the headlamp switch . Check
for battery voltage at the park lamp switch output
circuit cavity of the left (black) cluster connector. If
OK, replace the faulty bulb . If not OK, go to Step 3 .
(3) Disconnect and isolate the battery negative
cable . Unplug the headlamp switch connector . Check
for continuity between the park lamp switch out-
put circuit cavities of the left (black) cluster connec-
tor and the headlamp switch connector. If OK, refer
to Group 8L - Lamps for diagnosis of the headlamp
switch . If not OK, repair the open circuit as required .
SEAT BELT REMINDER LAMP
The diagnosis found here addresses an inoperative
seat belt reminder lamp condition. If the lamp comes
on and flashes following its display function (for
about seven seconds after the ignition switch is
turned to the On position), refer to the diagnosis for
the airbag indicator lamp in this group . For circuit
descriptions and diagrams, refer to 8W-40 - Instru-
ment Cluster in Group 8W - Wiring Diagrams .
WARNING : ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO
GROUP 8M - PASSIVE
RESTRAINT SYSTEMS
BEFORE ATTEMPTING
STEERING
WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE . FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
If the seat belt reminder lamp fails to light during
its display function, replace the seat belt reminder
lamp bulb with a known good unit. If the reminder
lamp still fails to operate, see Instrument Cluster in
this group for diagnosis of the seat belt reminder
lamp and gauge cluster circuitry.
TURN SIGNAL INDICATOR LAMPS
The diagnosis found here addresses an inoperative
turn signal indicator lamp condition . For any other
turn signal problem, refer to Group 8J - Turn Signal
and Hazard Warning Systems for diagnosis . If no
turn signal or hazard warning system problem is
found, the following procedure will help locate a
short or open in the indicator lamp circuit . For cir-
cuit descriptions and diagrams, refer to 8W-40 -
Instrument Cluster and 8W-50 - Front Lighting in
Group 8W - Wiring Diagrams .
WARNING : ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO GROUP 8M
- PASSIVE
INSTRUMENT PANEL SYSTEMS 8E - 1 7
RESTRAINT SYSTEMS
BEFORE ATTEMPTING
STEERING
WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE . FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Disconnect and isolate the battery negative
cable. Remove the instrument cluster bezel and the
cluster assembly as described in this group .
(2) Connect the battery negative cable. Activate
the hazard warning system by moving the hazard
warning switch button to the On position . Check for
battery voltage at the inoperative (right or left)
turn signal circuit cavity of the cluster connector.
There should be a switching (on and off) battery volt-
age signal . If OK, replace the faulty (right or left)
indicator bulb . If not OK, repair the open circuit to
the turn
signal/hazard warning (multi-function)
switch as required .
UPSHIFT INDICATOR LAMP
The diagnosis found here addresses an inoperative
upshift indicator lamp condition . If lamp accuracy is
suspect, diagnosis should be performed with a DRB
scan tool as described in the proper Powertrain Diag-
nostic Procedures manual . For circuit descriptions
and diagrams, refer to 8W-40 - Instrument Cluster in
Group 8W - Wiring Diagrams .
WARNING : ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO GROUP
8M - PASSIVE
RESTRAINT SYSTEMS BEFORE
ATTEMPTING
STEERING WHEEL, STEERING
COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE . FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY .
If the upshift indicator lamp fails to light during
the bulb test (about three seconds after the ignition
switch is turned to the On position), replace the
upshift indicator lamp bulb with a known good unit .
If the indicator lamp still fails to operate, diagnosis
of the Powertrain Control Module and the CCD data
bus should be performed with a DRB scan tool as
described in the proper Powertrain Diagnostic Proce-
dures manual . For diagnosis of the upshift indicator
lamp and the gauge cluster circuitry, see Instrument
Cluster in this group .