Jeep 1997 Grand Cherokee Service Manual page 325

STARTER ENGINE GROUND MOTOR STARTER BATTERY MOTOR VOLTMETER VOLTMETER
ZG
DIAGNOSIS AND TESTING (Continued)
Fig. 6 Test Battery Positive Cable Resistance-
Fig. 7 Test Ground Circuit Resistance -Typical
above 0.2 volt, correct the poor starter to engine
block ground contact.
Fig. 8 Test Starter Ground - Typical
If the resistance tests detect no feed circuit prob-
lems, remove the starter and see the Solenoid Test
procedure in this group.
VOLTMETER
Typical
BATTERY BATTERY SOLENOID SOLENOID
CONTROL CIRCUIT TEST
For circuit descriptions and diagrams, refer to
8W-21 - Starting System in Group 8W - Wiring Dia-
grams. The starter control circuit consists of:
• Battery
• Starter relay
• Starter solenoid
• Ignition switch
• Park/neutral position switch (automatic trans-
mission)
• Clutch pedal position switch (manual transmis-
sion)
• Wire harness and connections.
Test procedures for these components should be
performed in the order in which they are listed, as
follows:
SOLENOID TEST
Remove the starter as described in this group.
Then proceed as follows:
(1) Remove the wire from the solenoid field coil
terminal.
(2) Check for continuity between the solenoid ter-
minal and the field coil terminal with a continuity
tester (Fig. 9). There should be continuity. If OK, go
to Step 3. If not OK, replace the faulty starter assem-
bly.
Fig. 9 Continuity Test Between SolenoidTerminal
(3) Check for continuity between the solenoid ter-
minal and the solenoid case (Fig. 10). There should
be continuity. If OK, go to Step 4. If not OK, replace
the faulty starter assembly.
Fig. 10 Continuity Test Between SolenoidTerminal
(4) Connect the solenoid field coil wire to the field
coil terminal.
(5) Install the starter as described in this group.
SOLENOID TERMINAL FIELD COIL TERMI- SOLENOID TER- OHMMETER OHMMETER MINAL
STARTING SYSTEMS
and Field Coil Terminal
and Solenoid Case
NAL
8B - 7