Chrysler RAM TRUCK 2500 1994 Service Manual page 456

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VEHICLE SPEED CONTROL SYSTEM 8H - 7
(3) Connect negative lead of a voltmeter to a good
chassis ground near servo,
(4) Disconnect 4-way connector going to servo
(Figs. 1 and 2). Pin 2 of the main harness 4-way con­
nector should read approximately battery voltage. I f
not, check for loose connections, brake switch adjust­
ment or, repair the main harness as necessary.
(5) Connect a jumper wire between pin 2 of the
4-way servo connector of the main harness and pin 2
of the servo. The other 3 terminals from the servo
should show battery voltage. I f not, replace the servo.
(6) Turn ignition OFF. Using an ohmmeter, connect
one lead to a good body ground. Touch the other lead
to pin 1 i n the 4-way connector of the main harness.
The meter should show continuity. I f not, repair
ground circuit as necessary.
Fig. 1 Servo And Harness Connector
ELECTRICAL TESTS AT POWEKTRAIN
CONTROL MODULE
(1) Unplug 60-way connector from powertrain con­
trol module, located on the passenger side dash panel
i n the engine compartment (Fig. 3).
(2) Connect negative lead of voltmeter to a good
body ground near the module.
(3) For the following tests, the ignition switch
must be i n the ON position. Refer to Fig. 4 for con­
troller terminal locations. Touch the positive lead of
the voltmeter to the terminal i n cavity number 33.
PIN 2 PIN 3
898H-5
Fig. 2 Servo Harness Connector
Location
With the speed control switch i n the OFF position,
the voltmeter should read zero volts. With the speed
control switch i n the ON position, the voltmeter
should read battery voltage. I f not, repair the main
harness as necessary.
Fig. 4 Powertrain Control Module 60-Way Connector
Shown from Terminal End
(4) Touch the positive lead of the voltmeter to the
terminal i n cavity number 53. As i n step (3), the volt-