Dodge R1500 1999 Service Manual page 859

junction block. See WIRING DIAGRAMS.
4) Turn ignition off. Disconnect negative battery cable.
Disconnect parking brake switch connector. Switch is located at base
of parking brake lever. Ensure parking brake lever is released. Check
continuity between ground and parking brake switch terminal. If
continuity does not exist, go to next step. If continuity exists,
adjust or replace parking brake switch.
5) Ensure parking brake switch is still disconnected. Turn
ignition off. Remove instrument cluster. See INSTRUMENT CLUSTER under
REMOVAL & INSTALLATION. Check continuity between ground and park brake
switch connector. If continuity does not exist, go to next step. If
continuity exists, repair short to ground between instrument cluster
and park brake switch.
6) Check continuity between park brake switch connector and
instrument cluster connector C1, terminal No. 3 (White/Pink wire on
Ram Van and Ram Wagon; White/Light Green wire on Ram Pickup). See
Fig. 1. If continuity does not exist, repair open circuit. See WIRING
DIAGRAMS. If continuity exists, see PRELIMINARY DIAGNOSIS under SELF-
DIAGNOSTIC SYSTEM.
FOUR WHEEL DRIVE (4WD) LIGHT INOPERATIVE (RAM PICKUP)
1) Remove and inspect fuse No. 17 (10-amp) in junction block.
Junction block is located at left end cover of instrument panel. If
fuse is okay, go to next step. If fuse is blown, locate and repair
cause of blown fuse. Install new fuse and recheck system operation.
2) Turn ignition on. Measure voltage between ground and power
side of fuse No. 17. If battery voltage is present, go to next step.
If battery voltage is not present, locate and repair open circuit
between ignition switch and junction block.
3) Turn ignition off. Disconnect negative battery cable.
Disconnect 4WD switch connector. 4WD switch connector is located at
right side of front axle. Check continuity between 4WD switch
connector Black wire and ground. If continuity does not exist, repair
open Black wire between 4WD switch and ground. If continuity exists,
go to next step.
4) Reconnect battery cable. Turn ignition on. Install jumper
wire between 4WD switch connector terminals. 4WD light should
illuminate. If light illuminates, replace 4WD switch. If light does
not illuminate, go to next step.
5) Turn ignition off. Disconnect negative battery cable.
Ensure 4WD switch is still disconnected. Remove instrument cluster.
See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Check continuity
between ground and instrument cluster connector C2 terminal No. 10
(Gray wire). See Fig. 1. If continuity does not exist, go to next
step. If continuity exists, repair short to ground in wire between
instrument cluster and 4WD switch.
6) Check continuity of wire between 4WD switch connector and
terminal No. 10 at instrument cluster connector C2. If continuity does
not exist, repair open wire. If continuity exists, replace bulb.
LOW WASHER FLUID LIGHT INOPERATIVE
1) Remove and inspect fuse No. 17 (10-amp) on Ram Pickup or
fuse No. 11 (10-amp) on Ram Van and Ram Wagon in junction block.
Junction block is located at left end cover of instrument panel. If
fuse is okay, go to next step. If fuse is blown, locate and repair
cause of blown fuse. Install new fuse and recheck system operation.
2) Turn ignition on. Measure voltage between ground and power
side of fuse No. 14 (10-amp) on Ram Pickup or fuse No. 11 (10-amp) on
Ram Van and Ram Wagon. If battery voltage is present, go to next step.
If battery voltage is not present, locate and repair open circuit
between ignition switch and junction block.