Dodge RAM TRUCK 1500 1995 Service Manual page 348

B R
BATTERY/STARTING/CHARGING SYSTEMS DIAGNOSTICS SA -15
VOLTMETER
BATTERY
898A-17
Fig. 14 Test Battery Connection Resistance
BATTERY
STARTER
MOTOR VOLTMETER 898A-20
Fig, 15 Test Battery Positive Cable Resistance -
Typical
(4) Connect voltmeter to measure between the bat­
tery negative post and a good clean ground on the
engine block (Fig, 16), Rotate and hold ignition
switch in the START position. Observe voltmeter. If
voltage reads above 0.2 volt, correct poor contact at
battery negative cable attaching point. Repeat test. If
reading is still above 0.2 volt, replace battery nega­
tive cable.
VOLTMETER
ENGINE v
GROUNDX
BATTERY
898A-18
(5) Connect positive lead of voltmeter to starter
housing. Connect negative lead of voltmeter to bat­
tery negative terminal (Fig. 17). Rotate and hold ig­
nition -switch in the START position. Observe
voltmeter. If voltage reads above 0.2 volt, correct poor
starter to engine ground.
STARTER
MOTOR
BATTERY
VOLTMETER
Fig, W Test Ground Circuit Resistance
898A-26
Fig. 17 Test Starter Ground - Typical
If resistance tests detect no feed circuit problems,
remove the starter and see Solenoid Test in this
group.
CONTROL CIRCUIT TESTS
The starter control circuit consists of:
• starter solenoid
• starter relay
© ignition switch
• park/neutral position switch (automatic transmis­
sion)
© clutch pedal position switch (manual transmission)
• wiring harness and connections.
Test procedures for these components are as fol­
lows, and should be followed in the order described.
CAUTION: Before performing any test, unplug Auto
Shut-Down (ASD) relay from Power Distribution
Center (PDC)(gas engine) or unplug fuel shutdown
solenoid connector (diesel engine) to prevent en­
gine from starting.
SOLENOii TEST
Refer to Group 8B - Battery/Starter/Generator Ser­
vice for starter removal procedures.
(1) Disconnect solenoid field coil wire from field
coil terminal.
(2) Check for continuity between solenoid terminal
and field coil terminal with a continuity tester. There
should be continuity (Fig. 18).
(3) Check for continuity between solenoid terminal
and solenoid case. There should be continuity (Fig.
19).