Dodge ram truck 3500 1996 Service Manual page 539

mm
CHIME/BUZZER WARNING SYSTEMS 8U - 3
D I A G N O S I S
AMD
TESTING
( C o n t i n u e d )
3. I f not OK, repair the open circuit to the driver's
door jamb switch as required.
(3) Insert the ignition key in the ignition lock cyl­
inder. Check for continuity between the key-in switch
sense circuit and the left front door jamb switch
sense circuit terminals of the key-in switch. There
should be continuity until the key is removed. I f OK,
go to Step 4. I f not OK, replace the faulty ignition
switch.
(4) Check for continuity between the key-in switch
sense circuit cavities of the key-in switch connector
and the buzzer module connector. There should be
continuity. I f not OK, repair the open circuit to the
buzzer module as required.
HEADLAMP SWITCH
For circuit descriptions and diagrams, refer to
8W-44 - Interior Lighting in Group 8W - Wiring Dia­
grams.
(1) Remove the headlamp switch from the instru­
ment panel. Refer to Group 8E - Instrument Panel
Systems for the procedures. Unplug the headlamp
switch connector. Open the driver's door. Check for
continuity between the left front door jamb switch
sense circuit cavity of the headlamp switch connector
and a good ground. There should be continuity until
the driver's door is closed. I f OK, go to Step 2. I f not
OK, repair the circuit to the driver's door jamb
switch as required.
(2) Check for continuity between the key-in igni­
tion switch sense circuit cavities of the headlamp
switch connector and the buzzer module connector.
There should be continuity. I f OK, go to Step 3. I f not
OK, repair the open circuit to the buzzer module as
required.
(3) Check for continuity between the left front door
jamb switch sense circuit and the key-in ignition
switch sense circuit terminals of the headlamp
switch. There should be no continuity with the
switch i n the Off position, and there should be conti­
nuity with the switch in the park or head lamps On
position. I f not OK, replace the faulty headlamp
switch.
DRIVER'S SEAT BELT SWITCH
For circuit descriptions and diagrams, refer to
8W-44 - Interior Lighting in Group 8W - Wiring Dia­
grams.
(1) Unplug the seat belt switch connector on the
floor under the driver's seat near the seat belt buck­
le-half anchor. Check for continuity between the seat
belt switch sense circuit and the ground circuit cavi­
ties of the seat belt half *of the connector. There
should be continuity with the seat belt unbuckled,
and no continuity with the seat belt buckled. I f OK,
go to Step 2. I f not OK, replace the faulty seat belt
buckle-half assembly.
(2) Check for continuity between the ground cir­
cuit cavity in the harness half of the seat belt switch
connector and a good ground. There should be conti­
nuity. I f OK, go to Step 3. I f not OK, repair the cir­
cuit to ground as required.
(3) Check for continuity between the seat belt
switch sense circuit cavities in the harness half of
the seat belt switch connector and the buzzer module
connector. There should be continuity. I f not OK,
repair the open circuit as required.
R E M O V A L AND INSTALLATION
BUZZER MODULE
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the five screws securing the knee
blocker to the lower instrument panel (Fig. 2).
Fig. 2 Knee Blocker Remove/Install
(3) The buzzer module connector is on a bracket
attached to the lower instrument panel reinforcement
just inboard of the steering column. Release the con­
nector latch from the buzzer module and unplug the
module from the connector.
(4) To install, align the buzzer module terminals
and latch tab with the connector cavities and latch,
then push the module firmly into place.
(5) Install the knee blocker.
(6) Connect the battery negative cable.
(7) Test the buzzer module operation.