Dodge RAM TRUCK 1500 1995 Service Manual page 524

BR
CHIME/BUZZER WARNING SYSTEMS 8U - 3
KEY-IN SWITCH &
HALO LIGHT
MULTI-FUNCTION
SWITCH
IGNITION
SWITCH
TURN SIGNAL
SWITCH & LEVER
SPEED
CONTROL
J918J-2
Fig. 4 Key-In Switch Connector
O O O O
4 3 2 1
WIRE
CAVITY
APPLICATION
CONTINUITY
BETWEEN
1
2
Hab lamp
Hab lamp
1 & 2 Almost zero ohms
(bulb filament)
3
4
Key-in warning switch
Key-in warning switch
3 & 4 with key in ignition
J918M-3
Fig. 5 Key-In Switch Continuity
(2) Insert ignition key i n ignition lock cylinder.
Check for continuity between key-in switch cavities 3
and 4. There should be continuity u n t i l key is re­
moved. I f OK, go to next step. I f not OK, replace ig­
n i t i o n switch.
(3) Check for continuity between key-in switch har­
ness connector cavity 3 (light blue wire) and cavity
for t e r m i n a l 6 of buzzer module i n fuseblock module.
There should be continuity. I f not OK, repair circuit
from switch to fuseblock module as required.
HEADLAMP SWITCH
(1) Remove headlamp switch from i n s t r u m e n t
panel (refer to Group 8E - I n s t r u m e n t Panel and
Gauges for procedure). U n p l u g headlamp switch con­
nector. Open driver's door. Check for continuity be­
tween headlamp switch connector cavity w i t h black/
l i g h t blue wire and a good ground. There should be
continuity u n t i l driver's door is closed. I f OK, go to
next step. I f not OK, repair circuit f r o m headlamp
switch to driver's door j a m b switch as required.
(2) Check for continuity between headlamp switch
connector cavity w i t h light blue wire and cavity for
t e r m i n a l 6 of buzzer module i n fuseblock module.
There should be continuity. I f OK, go to next step. I f
not OK, repair circuit from headlamp switch to fuse-
block module as required.
(3) Check continuity between headlamp switch ter­
m i n a l for connector cavity w i t h black/light blue wire
and t e r m i n a l for cavity w i t h light blue wire. There
should be no continuity w i t h switch i n off position,
and there should be continuity w i t h switch i n p a r k
lamps or headlamps on position. I f not OK, replace
headlamp switch.
DRIVER'S SEAT BELT SWITCH
(1) U n p l u g seat belt switch connector near seat
belt anchor on floor. Check for continuity between
t w o cavities of seat' belt h a l f of connector. There
should be continuity w i t h seat belt unbuckled, and
no continuity w i t h seat belt buckled. I f OK, go to
next step. I f not OK, replace seat belt buckle-half as­
sembly.
(2) Check for continuity between cavity w i t h black/
orange wire i n harness h a l f of seat belt switch con­
nector and a good ground. There should be
continuity. I f O K , go to next step. I f not OK, repair
circuit to ground as required.
(3) Check for continuity between cavity w i t h l i g h t
green/red wire i n harness h a l f of seat belt switch con­
nector and cavity for t e r m i n a l 4 of buzzer module i n
fuseblock module. There should be continuity. I f not
O K , repair circuit f r o m seat belt switch connector to
fuseblock module as required.
BUZZER MODULE SCHEMATIC
r — i DOOR s w
J (SHOWN DOOR CLOSED)
KEY SW* i l LIGHTS S W
(SHOWN KEY OUT) / / (SHOWN LIGHTS OFF)
! —H 1—h/H-°B+
5 6 7 8
• • • •
• • • •
1 2
3 4
,
,^,l#nfej^
m
1
SEAT BELT S W
(SHOWN IGN OFF)
BULKLtu)
PIN VIEW (SAME AS REAR SIDE [WIRE SIDE)
CONNECTOR VIEW)
X = Do Not Care
FUNCTION DESCRIPTION
IGN.
SEAT
BELT
DRIVER'S
DOOR
KEY HEAD
LAMPS
Seat
Belt
Reminder
4 to 8 Second
Tone and
Lamp Output
^ O n
O P
Not
Bckld
X X X
Seat
Belt
Reminder 4 to 8 Second
Lamo^Output
^ O n
O P
Bckld X
X X
Key and
Head Lamp
Reminder*
Continuous,
Steady
Tone
X
X
Open
In X
Key and
Head Lamp
Reminder*
Continuous,
Steady
Tone
X
X
Open
X On
J948U-9