Seat Belt Reminder Lamp; Transmission Oil Temperature Warning Lamp; Turn Signal Indicator Lamps - Dodge ram truck 3500 1996 Service Manual

8E - 1 6 INSTRUMENT PANEL SYSTEMS
DIAGNOSIS AND TESTING (Continued)
SEAT BELT REMINDER LAMP
The diagnosis found here addresses an inoperative
seat belt reminder lamp condition. I f the lamp comes
on and stays on, refer to Group 8U - Chime/Buzzer
Warning Systems for diagnosis. I f no warning system
problem is found, the following procedure will help
locate a short or open in the lamp circuit. For circuit
descriptions and diagrams, refer to 8W-40 - Instru­
ment Cluster in Group 8W - Wiring Diagrams.
(1) Disconnect and isolate the battery negative
cable. Remove the instrument cluster bezel and the
cluster assembly. Unplug the left cluster connector.
Check for continuity between the ground circuit cav­
ity of the left cluster connector and a good ground.
There should be continuity. I f OK, plug the left clus­
ter connector back into the cluster and go to Step 2.
If not OK, repair the open circuit as required.
(2) Connect the battery negative cable. Install a
jumper wire between a 12-volt battery feed source
and the seat belt lamp driver circuit cavity of the left
cluster connector. The lamp should light. I f OK, go to
Step 3. I f not OK, replace the faulty bulb.
(3) Disconnect and isolate the battery negative
cable. Unplug the chime/buzzer module from the
buzzer module connector. Unplug the left cluster con­
nector. Check for continuity between the seat belt
lamp driver circuit cavity of the left cluster connector
and a good ground. There should be no continuity. I f
OK, go to Step 4. I f not OK, repair the short circuit
as required.
(4) Check for continuity between the seat belt
lamp driver circuit cavities of the left cluster connec­
tor and the buzzer module connector. There should be
continuity. I f not OK, repair the open circuit as
required.
TRANSMISSION OIL TEMPERATURE WARNING
LAMP
The diagnosis found here addresses an inoperative
transmission oil temperature warning lamp condi­
tion. I f the problem being diagnosed is related to
lamp accuracy, be certain to confirm that the problem
is with the lamp and not with the transmission oil
cooling system. Proper transmission oil flow and
cooler operation should be checked before you pro­
ceed with lamp diagnosis. For diagnosis and service
of the sensor and transmission oil cooling system,
refer to Group 21 - Transmission. For circuit descrip­
tions and diagrams, refer to 8W-46 - Message Center
in Group 8W - Wiring Diagrams.
(1) Disconnect and isolate the battery negative
cable. Remove the instrument cluster bezel and the
message center. Do not unplug the message center
connector. Connect the battery negative cable. Turn
the ignition switch to the On position. Check for bat­
tery voltage at the fused ignition switch output cir­
cuit cavity of the message center connector. I f OK, go
to Step 2. I f not OK, repair the open circuit as
required.
(2) Turn the ignition switch to the Off position.
Install a jumper wire between the transmission tem­
perature lamp driver circuit cavity of the message
center connector and a good ground. Turn the igni­
tion switch to the On position. The lamp should light.
I f OK, go to Step 2. I f not OK, replace the faulty
bulb.
(3) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Unplug the message center connector, and the Pow­
ertrain Control Module (PCM) connector C (gray).
Check for continuity between the transmission tem­
perature lamp driver circuit cavity of the message
center connector and a good ground. There should be
no continuity. I f OK, go to Step 4. I f not OK, repair
the short circuit as required.
(4) Check for continuity between the transmission
temperature lamp driver circuit cavities of the mes­
sage center connector and the PCM connector C.
There should be continuity. I f OK, refer to Group 21 -
Transmission to diagnose the temperature sensor and
circuit. I f not OK, repair the open circuit as required.
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. I f no
turn signal or hazard warning system problem is
found, the following procedure will help locate a
short or open i n 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.
(1) Disconnect and isolate the battery negative
cable. Remove the instrument cluster bezel and the
cluster assembly. Do not unplug the cluster connec­
tors. Probe the ground circuit cavities of the left clus­
ter connector. Check for continuity to a good ground.
There should be continuity. I f OK, go to Step 2. I f not
OK, repair the open circuit(s) as required.
(2) Connect the battery negative cable. Install a
jumper wire from the inoperative (right or left) turn
signal circuit cavity of the left cluster connector to a
12-volt battery feed source. The lamp should light. I f
OK, go to Step 3. I f not OK, replace the faulty bulb.
(3) Disconnect and isolate the battery negative
cable. Unplug the left cluster connector. Disconnect
the turn signal (multi-function) switch connector.
Check for continuity between the inoperative (right
or left) turn signal circuit cavities of the left cluster
connector and the multi-function switch connector.
There should be continuity. I f OK, refer to Group 8J -