Starter Solenoid; Starter Relay; Relay Test; Continuity Test Between Solenoid Terminal And Field Coil Terminal - Jeep Cherokee 2000 Service Manual

8B - 10 STARTING SYSTEMS
DIAGNOSIS AND TESTING (Continued)
STARTER MOTOR
(1) Remove the starter motor from the vehicle.
Refer to Starter Motor in the index of this service
manual for the location of the proper starter motor
removal and installation procedures.
(2) Mount the starter motor securely in a soft-
jawed bench vise. The vise jaws should be clamped
on the mounting flange of the starter motor. Never
clamp on the starter motor by the field frame.
(3) Connect a suitable volt-ampere tester and a
12-volt battery to the starter motor in series, and set
the ammeter to the 100 ampere scale. See the
instructions provided by the manufacturer of the
volt-ampere tester being used.
(4) Install a jumper wire from the solenoid termi-
nal to the solenoid B(+) terminal stud. The starter
motor should operate. If the starter motor fails to
operate, replace the faulty starter motor.
(5) Adjust the carbon pile load of the tester to
obtain the free running test voltage. Refer to Start-
ing System in the index of this service manual for
the location of the proper starter motor free running
test voltage specifications.
(6) Note the reading on the ammeter and compare
this reading to the free running test maximum
amperage draw. Refer to Starting System in the
index of this service manual for the location of the
proper starter motor free running test maximum
amperage draw specifications.
(7) If the ammeter reading exceeds the maximum
amperage draw specification, replace the faulty
starter motor.

STARTER SOLENOID

This test can only be performed with the starter
motor removed from the vehicle.
(1) Remove the starter motor from the vehicle.
Refer to Starter Motor in the index of this service
manual for the location of the proper starter motor
removal and installation procedures.
(2) Disconnect the wire from the solenoid field coil
terminal.
(3) Check for continuity between the solenoid ter-
minal and the solenoid field coil terminal with a con-
tinuity tester (Fig. 11). There should be continuity. If
OK, go to Step 4. If not OK, replace the faulty starter
motor.
(4) Check for continuity between the solenoid ter-
minal and the solenoid case (Fig. 12). There should
be continuity. If not OK, replace the faulty starter
motor.

STARTER RELAY

The starter relay (Fig. 13) is located in the Power
Distribution Center (PDC), in the engine compart-
ment. Refer to the fuse and relay layout label affixed
Fig. 11 Continuity Test Between Solenoid Terminal
and Field Coil Terminal - Typical
1 – SOLENOID
2 – SOLENOID TERMINAL
3 – OHMMETER
4 – FIELD COIL TERMINAL
Fig. 12 Continuity Test Between Solenoid Terminal
and Solenoid Case - Typical
1 – SOLENOID
2 – SOLENOID TERMINAL
3 – OHMMETER
to the underside of the PDC cover for starter relay
identification and location. Refer to Starting Sys-
tem in the index of this service manual for the loca-
tion of complete starting system wiring diagrams.

RELAY TEST

(1) Remove the starter relay from the PDC. Refer
to Starter Relay in the index of this service manual
for the location of the proper starter relay removal
and installation procedures.
(2) A relay in the de-energized position should
have continuity between terminals 87A and 30, and
no continuity between terminals 87 and 30. If OK, go
to Step 3. If not OK, replace the faulty relay.
(3) Resistance between terminals 85 and 86 (elec-
tromagnet) should be 75
4. If not OK, replace the faulty relay.
(4) Connect a battery to terminals 85 and 86.
There should now be continuity between terminals
30 and 87, and no continuity between terminals 87A
and 30. If OK, perform the Relay Circuit Test that
follows. If not OK, replace the faulty relay.
5 ohms. If OK, go to Step
XJ