Dodge RAM TRUCK 1500 1995 Service Manual page 424

8E -14 INSTRUMENT PANEL AND GAUGES — -
NO. IDENTIFICATION
3
BRAKE WARNING LAMP OUTPUT
Fig. 16 Ignition Switch Connector
(6) Remove instrument cluster bezel and cluster
assembly. Connect battery negative cable and igni­
tion switch connector. Do not unplug cluster connec­
tors. Install a jumper wire between cavity 5 of cluster
connector A (white connector) and a good ground.
Turn ignition switch to ON position. Lamp should
light. If OK, go to next step. If not OK, replace faulty
bulb.
(7) Turn ignition switch to OFF and remove
jumper wire. Disconnect battery negative cable. Un­
plug ignition switch, parking brake switch, vacuum
sensor (diesel engine only) and brake warning switch
connectors. Unplug connector at RWAL or ABS con­
trol module (Figs. 14 or 15), as equipped. Unplug
cluster connector A. Check for continuity between
cavity 5 of cluster connector A and a good ground.
There should be no continuity. If OK, go to next step.
If not OK, repair short circuit as required.
(8) Check for continuity between cavity 5 of cluster
connector A and the following points:
• parking brake switch connector
• brake warning switch connector
• vacuum sensor connector (diesel engine only)
® ignition switch connector cavity 3
© RWAL control module connector cavity 6
• ABS control module connector cavity 25.
~ — — — — — — — — -—^— B R
In each case there should be continuity. If not OK,
repair open circuit as required.
jFQ^Mmmt BMiwe INDICATOR LAMP
(1) Turn ignition switch to ON position. Unplug
4WD switch connector at front axle disconnect hous­
ing. Install a jumper wire between the two cavities of
harness half of switch connector. Lamp should light.
Remove jumper and lamp should go off. If OK, re­
place transfer case switch. If not OK, go to next step.
(2) Turn ignition switch to OFF position. Check for
continuity between cavity 2 (black wire) of transfer
case switch connector and a good ground. There
should be continuity. If OK, go to next step. If not
OK, repair open circuit to ground as required.
(3) Disconnect battery negative cable. Remove in­
strument cluster bezel and cluster assembly. Connect
battery negative cable. Install a jumper wire between
cavity 13 of cluster connector B and a good ground.
Turn ignition switch to ON position. Lamp should
light. If OK, go to next step. If not OK, replace faulty
bulb.
(4) Turn ignition switch to OFF position. Discon­
nect battery negative cable. Unplug cluster connector
B (black connector). Probe cavity 13 of cluster con­
nector B. Check for continuity to a good ground.
There should be no continuity. If not OK, repair short
circuit as required.
(5) Still probing cavity 13 of cluster connector B,
check for continuity to cavity 1 (black/gray wire) of
4WD switch connector. There should be continuity. If
OK, go to next step. If not OK, repair open circuit as
required.
HmmiAmp
HIGH BEAM
INDICATOR LAMP
(1) Check that headlamp high beams are func­
tional. If OK, go to next step. If not OK, refer to
Group 8L - Lamps for diagnosis of headlamp system.
(2) Disconnect battery negative cable. Remove in­
strument cluster bezel and cluster assembly. Unplug
cluster connector A, (white connector). Connect bat­
tery negative cable. Turn headlamps on and select
high beam. Check for battery voltage at cavity 13 of
cluster connector A. If OK, replace indicator bulb. If
not OK, repair circuit to headlamp dimmer (multi­
function) switch as required.
LOW F U E L WARNING LAMP
(1) Check that fuel gauge is operating as designed.
See Fuel Gauge Calibration chart in Specifications. If
OK, go to next step. If not OK, see Fuel Gauge in
this section for diagnosis.
(2) Disconnect battery negative cable. Unplug fuel
gauge sending unit connector. Remove instrument
cluster bezel and instrument cluster. Replace low fuel
warning bulb with a known good unit. Connect bat-
There should be continuity. If OK, go to next step. If
not OK, adjust or replace parking brake switch as re­
quired.
(4) Check for continuity between metal steering
column jacket and a good ground. There should be
continuity. If OK, go to next step. If not OK, refer to
Group 19 - Steering to check steering column ground
clip installation.
(5) Disconnect battery negative cable. Unplug igni­
tion switch connector (Fig. 16). While holding igni­
tion switch in START position, check for continuity
between ignition switch terminal 3 and a good
ground. There should be continuity. Release ignition
switch to ON position and check for continuity again
at switch terminal 3. There should be no continuity.
If OK, go to next step, if not OK, repair ignition
switch ground or replace faulty ignition switch as re­
quired.