Jeep 1996 Grand Cherokee Service Manual - page 313
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, diagnosis of the lamp,
and/or the gauge cluster circuitry should be per-
formed with a DRB scan tool as described in the
proper Body Diagnostic Procedures Manual.
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
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 depressing the hazard
warning switch. Check for battery voltage at the
inoperative (right or left) turn signal indicator lamp
circuit cavity of the cluster connector. There should
be a switching (on and off) battery voltage signal. If
OK, replace the faulty (right or left) indicator bulb. If
not OK, repair the open circuit to the turn signal
(multi-function) switch as required.
VEHICLE INFORMATION CENTER
The Vehicle Information Center (VIC) has a num-
ber of display functions and features. The diagnosis
found here addresses only those VIC messages and
functions that are controlled by hard wired inputs. To
diagnose any internally controlled VIC function or
feature, or any that are enabled by inputs on the
CCD data bus network, use a DRB scan tool and the
proper Body Diagnostic Procedures Manual. Refer to
8W-46 - Message Center in Group 8W - Wiring Dia-
grams.
COOLANT LEVEL LOW/COOLANT SENSOR
BAD
If the problem being diagnosed is related to lamp
accuracy, be certain to confirm that the problem is
with the lamp and sensor and not with the engine
coolant level. The actual engine coolant level should
be checked before you proceed with lamp and sensor
diagnosis. Refer to 8W-46 - Message Center in Group
8W - Wiring Diagrams for complete circuit descrip-
tions and 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.
(1) Unplug the coolant level sensor connector on
the coolant reserve bottle. Check for continuity
between the ground circuit cavity of the connector
and a good ground. There should be continuity. If
OK, go to Step 2. If not OK, repair the open circuit
as required.
(2) With the engine coolant at the proper level,
check the resistance between the two terminals of
the coolant level sensor. The resistance should be
3000 to 3500 ohms. If OK, go to Step 3. If not OK,
replace the faulty sensor.
(3) Disconnect and isolate the battery negative cable.
Remove the VIC module as described in this group.
Unplug the VIC module connector. Check for continuity
between the engine coolant level switch sense circuit
cavity of the VIC connector and a good ground. There
should be no continuity. If OK, go to Step 4. If not OK,
repair the short circuit as required.
8E - 16
INSTRUMENT PANEL SYSTEMS
ZJ
DIAGNOSIS AND TESTING (Continued)