Dodge RAM TRUCK 1500 1995 Service Manual page 417

B R INSTRUMENT PANEL AND GAUGES 8E - 7
E N G I N E C O O L A N T T E M P . S E N S O R
( F O R PCM O P E R A T I O N )
T E M P . G A U G E \ |
S E N S O R ( F O R T E M P . ~. *
G A U G E O P E R A T I O N )
J948D-9
Fig. 5 Coolant Temperature Sending Unit - V-10
Engine
COOLANT
TEMPERATURE
S E N S O R
J 9 4 8 E - 5 8
Fig. 6 Coolant Temperature Sending Unit - Diesel
Engine
(4) Probe cavity 7 of cluster connector A. Check for
continuity to a good ground. There should be no con­
tinuity. If OK, go to next step. If not OK, repair short
in circuit as required.
(5) Still probing cavity 7 of cluster connector A,
check for continuity to sending unit wiring connector.
There should be continuity. If OK, replace gauge. If
not OK, repair open in circuit as required.
top of the fuel tank. The gauge needle should move
to low end of gauge scale. If OK, go to next step. If
not OK, go to step 4.
(2) Connect a jumper wire between sending unit
ground cavity and fuel sensor input cavity in the
body half of the fuel gauge sending unit connector
(Fig. 7). The gauge needle should move to high end of
gauge scale. If OK, refer to Group 14 - Fuel System
for procedure to replace sending unit. If not OK, re­
move jumper wire and go to next step.
FUEL PUMP SUPPLY
INPUT TO GAUGE
SENDING UNIT GROUND
1 FUEL PUMP GROUND
J928E-49
Fig. 7 Fuel Gauge Sending Unit Connector
(3) Turn ignition switch to OFF. Disconnect battery
negative cable. Check for continuity between sending
unit ground cavity in the. body half of fuel gauge
sending unit connector and a good ground. There
should be continuity. If OK, go to next step. If not
OK, repair circuit to ground as required.
(4) Remove instrument cluster bezel and cluster
assembly. Disconnect instrument cluster connector B
(black connector).
(5) Probe cavity 11 of cluster connector B. Check
for continuity to a good ground. There should be no
continuity. If OK, go to next step. If not OK, repair
short circuit as required.
(6) Still probing cavity 11 of cluster connector B,
check for continuity to input to gauge cavity of send­
ing unit body half connector. There should be conti­
nuity. If OK, replace gauge. If not OK, repair open
circuit as required.
GEAR SELECTOR INDICATOR
Refer to Group 21 - Transmission and Transfer
Case for diagnosis, service, and adjustment of this
component.
FUEL GAUGE
The diagnosis found here addresses an inoperative
gauge condition. If the problem being diagnosed is re­
lated to gauge accuracy, be certain to confirm that
problem is with gauge and not with fuel tank. In­
spect fuel tank for signs of damage or distortion that
could affect sending unit performance before you pro­
ceed with gauge diagnosis. Refer to Group 14 - Fuel
System for more information.
(1) Turn ignition switch to ON. Disconnect fuel
gauge sending unit connector. Connector is located on
OIL PRESSURE GAUGE
The diagnosis found here addresses an inoperative
gauge condition. If the problem being diagnosed is re­
lated to gauge accuracy, be certain to confirm that
problem is with gauge and not with engine oiling sys­
tem performance. Actual engine oil pressure should
be checked with a test gauge and compared to gauge
readings before you proceed with gauge diagnosis.
Refer to Group 9 - Engines for more information.
(1) Turn ignition switch to ON. Disconnect oil pres­
sure sending unit connector (Figs. 8, 9 or 10). The
gauge needle should move to low end of gauge scale.