Dodge RAM TRUCK 1500 1995 Service Manual page 419

B R INSTRUMENT PANEL AND GAUGES 8E - 9
(1) Perform vehicle speed sensor test as described
in the appropriate Powertrain Diagnostic Procedures
manual. If OK, go to next step. If not OK, replace ve­
hicle speed sensor.
(2) Disconnect battery negative cable. Unplug vehi­
cle speed sensor and PCM connectors. Remove in­
strument cluster bezel and cluster assembly.
Disconnect instrument cluster connector A (white
connector).
(3) Probe cavity 11 of cluster connector A. 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.
(4) Still probing cavity 11 of cluster connector A,
check for continuity to cavity 1 of vehicle speed sen­
sor connector (Fig. 12). There should be continuity. If
OK, replace speedometer/odometer. If not OK, repair
open circuit as required.
3
NO.
IDENTIFICATION
1 VSS SIGNAL
2 SENSOR GROUND
3 SENSOR SUPPLY
J958E-6
Fig. 12 Vehicle Speed Sensor
Connector
TACHOMETER
(1) With engine running, check for tachometer sig­
nal at pin 43 of PCM connector (Fig. 13). See Ta­
chometer Calibration chart in Specifications. If OK,
go to next step. If not OK, refer to appropriate Pow­
ertrain Diagnostic Procedures manual to test PCM.
(2) Disconnect battery negative cable. Unplug PCM
connector. Remove instrument cluster bezel and clus­
ter assembly. Disconnect instrument cluster connec­
tor B (black connector).
(3) Probe cavity 3 of cluster connector B. Check for
continuity to a good ground. There should be no con­
tinuity. If OK, go to next step. If not OK, repair short
circuit as required.
(4) Still probing cavity 3 of cluster connector B,
check for continuity to cavity 43 of PCM connector.
There should be continuity. If OK, replace tachome­
ter. If not OK, repair open circuit as required.
TRIP ODOMETER
If the trip odometer is inoperative, but the speed­
ometer/odometer functions are unaffected, replace
TERMINAL END WIRE END
NO. IDENTIFICATION
32 MALFUNCTION INDICATOR LAMP
36 GENERATOR WARNING LAMP
43 TACHOMETER SIGNAL
54 UPSHIFT INDICATOR LAMP
J958E-7
Fig. 13 Powertrain Control Module Connector
speedometer assembly. If speedometer/odometer func­
tions are affected, see Speedometer/Odometer diagno­
sis in this section.
WOLTMETER
(1) Turn ignition switch to ON. Voltmeter should
read battery voltage. If all gauges except voltmeter
are OK, go to next step. If other gauges are inopera­
tive, see Gauges in this section for diagnosis.
(2) Using an accurate test voltmeter, measure bat­
tery voltage at battery. Compare this reading to in­
strument cluster voltmeter reading. Now see
Voltmeter Calibration chart in Specifications. If volt­
meter does not perform to specification, replace volt­
meter.