Chrysler RAM TRUCK 2500 1994 Service Manual page 406

INSTRUMENT PANEL AND GAUGES 8E - 9
EGR VALVE
Fig. 6 Oil Pressure Sending Unit—V6 and V8
J948E-38
Fig. 7 Oil Pressure Sending Unit—V10
check sending unit. I f not OK, turn ignition switch
OFF, remove jumper wire and continue with next
step.
(3) Pull instrument cluster from dash. Do not un­
plug cluster connectors. Refer to Instrument Cluster
Replacement for removal procedures.
(4) Check continuity between sending unit connec­
tor sending unit cavity (Fig. 5) and oil pressure sen­
sor input terminal (Fig. 11) on back of cluster. There
should be continuity. I f OK, continue with next step.
I f not OK, repair open circuit as required.
(5) Check continuity between oil pressure sensor
input terminal (Fig. 11) and ground. There should be
no continuity. I f OK, go to next step. I f not OK, re­
pair short circuit as required.
STEERING
PUMP
ENGINE BLOCK
J9119-74
Fig. 8 Oil Pressure Sending Unit—Diesel
J948E-55
Fig. 9 Oil Pressure Lamp—High Line Cluster
(6) With ignition switch i n ON position, check for
battery voltage across oil pressure gauge B+ terminal
and ground terminal (Fig. 11). I f OK, replace gauge.
I f not OK, continue with next step.
(7) Unplug cluster connector B (black). With igni­
tion switch i n ON position, check for battery voltage
at cavity #8. I f OK, continue to next step. I f not OK,
repair circuit to fuse #12.
(8) Turn ignition switch to OFF and check for con­
tinuity to ground at cluster connector B, cavity #9. I f
OK, replace cluster printed circuit board. I f not OK,
repair open circuit to ground.
COOLANT TEMPERATURE GAUGE DIAGNOSIS
When a problem occurs with an individual cluster
gauge, before disassembling the cluster to check the
gauge, check for a defective sending unit (sensor) or
wiring. I f all gauges and warning lamps are inopera-