1995 JEEP YJ Service And Repair Manual

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Page 385 of 2158

JEEP YJ 1995 Service And Repair Manual TACHOMETER
(1) With engine running, check for tachometer sig-
nal at pin 43 of PCM connector (Fig. 5). See Tachom-
eter Calibration chart in Specifications. If OK, go to
next step. If not OK, replace

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JEEP YJ 1995 Service And Repair Manual MAIN CLUSTER
8E - 30 INSTRUMENT PANEL AND GAUGESÐYJJ

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JEEP YJ 1995 Service And Repair Manual GAUGE PACKAGE CLUSTER
JINSTRUMENT PANEL AND GAUGESÐYJ 8E - 31

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JEEP YJ 1995 Service And Repair Manual INDICATOR LAMPS
If an individual indicator lamp is inoperative, see
the diagnostic procedure under the heading for that
lamp. If more than one indicator lamp or a combina-
tion of lamps and gauges in

INDICATOR LAMPS
If an individual indicator lamp is inoperative, see
the diagnostic procedure under the heading for that
lamp. If more than one indicator lamp or a combina-
tion of lamps and gauges in the main cluster or the
gauge package cluster is inoperative, see Gauges in
this section for diagnosis.
ANTI-LOCK BRAKE SYSTEM LAMP
The diagnosis found here addresses an inoperative
lamp condition. If the ABS lamp stays on with the ig-
nition switch in the ON position, or comes on and
stays on while driving, refer to Group 5 - Brakes for
diagnosis. If no ABS problem is found, the following
procedure will help locate a short or open in the ABS
lamp circuit.
(1) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Disconnect ABS control module connector.
(2) Install a jumper wire between cavity 6 of clus-
ter connector and a good ground. Connect battery
negative cable. Turn ignition switch to ON. Lamp
should light. If OK, remove jumper wire and go to
next step. If not OK, replace bulb.
(3) Turn ignition switch to OFF. Disconnect battery
negative cable and unplug cluster connector. Check
for continuity between cavity 6 of cluster connector
and a good ground. There should be no continuity. If
OK, go to next step. If not OK, repair short circuit as
required.
(4) Check continuity between cavity 6 of cluster
connector and cavity 52 of ABS control module con-
nector (Fig. 6). There should be continuity. If OK, re-
fer to Group 5 - Brakes for diagnosis of ABS control
module. If not OK, repair open circuit as required.
BRAKE WARNING LAMP
The diagnosis found here addresses an inoperative
lamp condition. If the brake warning lamp stays on
with the ignition switch in the ON position and the
parking brake released, refer to Group 5 - Brakes for
diagnosis. If no service brake or parking brake prob-
lem is found, the following procedure will help locate
a short circuit or faulty switch.
(1) Unplug parking brake switch connector. Turn
ignition switch to START position. Lamp should
light. Release ignition switch to ON position. Lamp
should go off. If OK, go to step 10. If not OK, go to
next step.
(2) Unplug brake warning switch connector. Install
a jumper wire between two cavities of connector.
Turn ignition switch to START. Lamp should light.
Remove jumper wire and lamp should go off. If OK,
replace brake warning switch. If not OK, remove
jumper wire and go to next step.
(3) Turn ignition switch to ON position. Install a
jumper wire between brake warning switch connectorcavity for circuit G9 and a good ground. Lamp should
light. If OK, go to step 5. If not OK, go to next step.
(4) Turn ignition switch to OFF. Remove jumper
wire and disconnect battery negative cable. Remove
left instrument cluster bezel and main cluster. Install
a jumper wire between cavity 1 of cluster connector
and a good ground. Connect battery negative cable
and turn ignition switch to ON. Lamp should light. If
OK, repair open in circuit to brake warning switch. If
not OK, replace bulb.
(5) Turn ignition switch to OFF and remove
jumper wire. Disconnect battery negative cable.
Check for continuity between brake warning switch
connector cavity for circuit G11 and a good ground
with ignition switch in START position. There should
be continuity. If not OK, go to next step.
(6) Turn ignition switch to OFF and remove
jumper wire. Unplug ignition switch connectors.
Check for continuity between ignition switch connec-
tor cavity for G11 circuit and a good ground. There
should be no continuity. If OK, go to next step. If not
OK, repair short circuit between ignition switch and
brake warning switch connectors as required.
(7) Check for continuity between ignition switch
connector cavity for G11 circuit and brake warning
switch connector cavity for G11 circuit. There should
be continuity. If OK, go to next step. If not OK, re-
pair open circuit as required.
(8) Check for continuity between metal steering
column jacket and a good ground. There should be
continuity. If OK, go to next step. If not OK, refer to
Group 19 - Steering to check steering column ground
clip installation.
Fig. 6 ABS Control Module Connector
8E - 32 INSTRUMENT PANEL AND GAUGESÐYJJ

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JEEP YJ 1995 Service And Repair Manual (9) Turn ignition switch to START position and
hold there. Check for continuity between terminal for
circuit G11 of ignition switch and a good ground.
There should be continuity. If not OK, replace ig

(9) Turn ignition switch to START position and
hold there. Check for continuity between terminal for
circuit G11 of ignition switch and a good ground.
There should be continuity. If not OK, replace igni-
tion switch.
(10) Unplug brake warning switch connector.
Check for continuity between parking brake switch
connector and a good ground. There should be no
continuity. If OK, go to next step. If not OK, repair
short circuit as required.
(11) Check for continuity between parking brake
switch connector and brake warning switch connector
cavity for circuit G11. There should be continuity. If
OK, replace parking brake switch. If not OK, repair
open circuit to brake warning switch as required.
FOUR-WHEEL DRIVE INDICATOR LAMP
(1) Apply parking brake, start engine, vehicle in
4WD Lock or 4WD.
(2) Unplug switch and touch harness side of wire
to ground. Lamp should light. If OK, check switch
operation, replace if bad. If bulb is OK, repair open
to indicator.
HEADLAMP HIGH BEAM INDICATOR LAMP
(1) Check that headlamp high beams are func-
tional. If OK, go to next step. If not OK, refer to
Group 8L - Lamps for diagnosis of headlamp system.
(2) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Unplug cluster connector. Connect battery negative
cable. Turn headlamps on and select high beam.
Check for battery voltage at cavity 17 of cluster con-
nector. If OK, replace indicator bulb. If not OK, re-
pair circuit to headlamp dimmer switch as required.
MALFUNCTION INDICATOR LAMP
The diagnosis found here addresses an inoperative
lamp condition. If the lamp comes on and stays on
with engine running, refer to Group 14 - Fuel System
for diagnosis. If no fuel or emission system problem
is found, the following procedure will help locate a
short or open in the lamp circuit.
(1) Disconnect battery negative cable. Unplug PCM
connector. Install a jumper wire from cavity 32 of
PCM connector (Fig. 5) to a good ground. Connect
battery negative cable. Turn ignition switch to ON.
Lamp should light. Remove jumper wire and lamp
should go OFF. If OK, refer to Powertrain Diagnostic
Procedures to check PCM. If not OK, go to next step.
(2) Turn ignition switch to OFF. Disconnect battery
negative cable. Remove left instrument cluster bezel
and main cluster assembly. Install a jumper wire
from cavity 2 of cluster connector to a good ground.
Connect battery negative cable. Turn ignition switch
to ON. Lamp should light. If OK, go to next step. If
not OK, replace bulb.(3) Turn ignition switch to OFF. Disconnect battery
negative cable. Unplug cluster connector. Check for
continuity between cavity 2 of cluster connector and
a good ground. There should be no continuity. If OK,
go to next step. If not OK, repair short circuit to
PCM as required.
(4) Check continuity between cavity 2 of cluster
connector and cavity 32 of PCM connector. There
should be continuity. If not OK, repair open circuit to
PCM as required.
SEAT BELT REMINDER LAMP
(1) Refer to Group 8U - Chime/Buzzer Warning
Systems to check chime/buzzer module operation. If
OK, go to next step. If not OK, replace chime/buzzer
module.
(2) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Unplug cluster connector. Check for continuity be-
tween cavity 20 of cluster connector and a good
ground. There should be continuity. If OK, plug clus-
ter connector back into cluster and go to next step. If
not OK, repair open circuit to ground as required.
(3) Connect battery negative cable. Install a
jumper wire between a 12-volt battery feed and cav-
ity 16 of cluster connector. Lamp should light. If OK,
go to next step. If not OK, replace bulb.
(4) Disconnect battery negative cable. Unplug
chime/buzzer module from fuseblock module. Unplug
cluster connector. Check for continuity between cav-
ity 16 of cluster connector and a good ground. There
should be no continuity. If OK, go to next step. If not
OK, repair short circuit to chime/buzzer module as
required.
(5) Check continuity between cavity 16 of cluster
connector and cavity for terminal A3 of chime/buzzer
module (Fig. 7) in fuseblock module. There should be
continuity. If not OK, repair open circuit to chime/
buzzer module as required.
Fig. 7 Chime/Buzzer Module Receptacle
JINSTRUMENT PANEL AND GAUGESÐYJ 8E - 33

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JEEP YJ 1995 Service And Repair Manual TURN SIGNAL INDICATOR LAMPS
(1) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Probe cavity 20 of cluster connector. Check for conti-
nuity to a goo

TURN SIGNAL INDICATOR LAMPS
(1) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Probe cavity 20 of cluster connector. Check for conti-
nuity to a good ground. There should be continuity. If
OK, go to next step. If not OK, repair open circuit to
ground.
(2) Connect battery negative cable. Install a
jumper wire from cavity 18 (left indicator) or cavity 7
(right indicator) of cluster connector to a 12-volt bat-
tery feed. Lamp should light. If OK, continue to next
step. If not OK, replace bulb.
(3) Disconnect battery negative cable. Check for
continuity between cavity 18 (left indicator) or cavity
7 (right indicator) of cluster connector and cavity H
(left front turn signal) or cavity J (right front turn
signal) of steering column wiring connector. There
should be continuity. If OK, refer to Group 8J - Turn
Signal and Hazard Warning Systems for further di-
agnosis. If not OK, repair open circuit as required.
UPSHIFT INDICATOR LAMP
(1) Disconnect battery negative cable. Unplug PCM
connector. Connect battery negative cable. Turn igni-
tion switch to ON. Install a jumper wire from cavity
54 of PCM connector (Fig. 5) to a good ground. Lamp
should light. Remove jumper from ground. Lamp
should go off. If OK, refer to Powertrain Diagnostic
Procedures manual to diagnose PCM. If not OK, turn
ignition switch to OFF and go to next step.
(2) Disconnect battery negative cable. Remove left
instrument cluster bezel and main cluster assembly.
Install a jumper wire from cavity 5 of cluster connec-
tor to a good ground. Connect battery negative cable.
Turn ignition switch to ON. Lamp should light. If
OK, go to next step. If not OK, replace bulb.
(3) Turn ignition switch to OFF. Disconnect battery
negative cable. Unplug cluster connector. Check for
continuity between cavity 5 of cluster connector and
a good ground. There should be no continuity. If OK,
go to next step. If not OK, repair short circuit as re-
quired.(4) Check for continuity between cavity 5 of cluster
connector and cavity 54 of PCM connector. There
should be continuity. If not OK, repair open circuit as
required.
CLUSTER ILLUMINATION LAMPS
(1) Check fuse 10 in fuseblock module. If OK, go to
next step. If not OK, replace fuse.
(2) Turn park lamps on at headlamp switch. Rotate
panel dimmer switch thumb-wheel to HI position,
just before interior lamps detent. Check for battery
voltage at fuse 10 in fuseblock module. Rotate panel
dimmer thumb-wheel towards LO position while ob-
serving test voltmeter. Reading should go from bat-
tery voltage to zero volts. If OK, go to next step. If
not OK, repair open circuit to headlamp switch or re-
fer to Group 8L - Lamps to diagnose headlamp
switch.
(3) Disconnect battery negative cable. Remove left
or center instrument cluster bezel and main or gauge
package cluster assembly. Unplug cluster connector.
Connect battery negative cable. Turn park lamps on
at headlamp switch. Rotate panel dimmer thumb-
wheel to HI position, just before interior lamps de-
tent. Check for battery voltage at cavity 21 of main
cluster connector, or cavity 7 of gauge package clus-
ter connector. If OK, go to next step. If not OK, re-
pair open circuit to fuse as required.
(4) Turn park lamps off. Disconnect battery nega-
tive cable. Remove fuse 10 from fuseblock module.
Probe cavity 21 of main cluster connector, or cavity 7
of gauge package cluster connector. Check for conti-
nuity to a good ground. There should be no continu-
ity. If OK, go to next step. If not OK, repair short
circuit as required.
(5) Probe cavity 20 of main cluster connector, or
cavities 1 and 13 of gauge package cluster connector.
Check for continuity to ground. There should be con-
tinuity. If not OK, repair open circuit as required.
8E - 34 INSTRUMENT PANEL AND GAUGESÐYJJ

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JEEP YJ 1995 Service And Repair Manual SERVICE PROCEDURES
CLUSTER ASSEMBLY REMOVE/INSTALL
MAIN CLUSTER
(1) Disconnect battery negative cable.
(2) Remove 6 screws from left instrument cluster
bezel (Fig. 8).
(3) Slide bezel toward steering

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JEEP YJ 1995 Service And Repair Manual Fig. 10 Main Cluster
8E - 36 INSTRUMENT PANEL AND GAUGESÐYJJ

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