Jeep XJ. Manual — part 668
• Probing Tools - These tools are used for probing
terminals in connectors (Fig. 4)Select the proper size
tool from Special Tool Package 6807, and insert it
into the terminal being tested. Use the other end of
the tool to insert the meter probe.
INTERMITTENT AND POOR CONNECTIONS
Most intermittent electrical problems are caused
by faulty electrical connections or wiring. It is also
possible for a sticking component or relay to cause a
problem. Before condemning a component or wiring
assembly, check the following items.
• Connectors are fully seated
• Spread terminals, or terminal push out
• Terminals in the wiring assembly are fully
seated into the connector/component and locked into
position
• Dirt or corrosion on the terminals. Any amount
of corrosion or dirt could cause an intermittent prob-
lem
• Damaged connector/component casing exposing
the item to dirt or moisture
• Wire insulation that has rubbed through causing
a short to ground
• Some or all of the wiring strands broken inside
of the insulation
• Wiring broken inside of the insulation
TROUBLESHOOTING WIRING PROBLEMS
When troubleshooting wiring problems there are
six steps which can aid in the procedure. The steps
are listed and explained below. Always check for non-
factory items added to the vehicle before doing any
diagnosis. If the vehicle is equipped with these items,
disconnect them to verify these add-on items are not
the cause of the problem.
(1) Verify the problem.
(2) Verify any related symptoms. Do this by per-
forming operational checks on components that are
in the same circuit. Refer to the wiring diagrams.
(3) Analyze the symptoms. Use the wiring dia-
grams to determine what the circuit is doing, where
the problem most likely is occurring and where the
diagnosis will continue.
(4) Isolate the problem area.
(5) Repair the problem area.
(6) Verify the proper operation. For this step,
check for proper operation of all items on the
repaired circuit. Refer to the wiring diagrams.
STANDARD PROCEDURE - TESTING FOR
VOLTAGE POTENTIAL
(1) Connect the ground lead of a voltmeter to a
known good ground (Fig. 5).
(2) Connect the other lead of the voltmeter to the
selected test point. The vehicle ignition may need to
be turned ON to check voltage. Refer to the appropri-
ate test procedure.
Fig. 4 PROBING TOOL
1 - SPECIAL TOOL 6801
2 - PROBING END
Fig. 5 Testing for Voltage Potential
8Wa - 01 - 6
8Wa-01 WIRING DIAGRAM INFORMATION
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WIRING DIAGRAM INFORMATION (Continued)
2001 JEEP CHEROKEE
STANDARD PROCEDURE - TESTING FOR
CONTINUITY
(1) Remove the fuse for the circuit being checked
or, disconnect the battery.
(2) Connect one lead of the ohmmeter to one side
of the circuit being tested (Fig. 6)
(3) Connect the other lead to the other end of the
circuit being tested. Low or no resistance means good
continuity.
STANDARD PROCEDURE - TESTING FOR A
SHORT TO GROUND
(1) Remove the fuse and disconnect all items
involved with the fuse.
(2) Connect a test light or a voltmeter across the
terminals of the fuse.
(3)
Starting at the fuse block, wiggle the wiring
harness about six to eight inches apart and watch
the voltmeter/test lamp.
(4)
If the voltmeter registers voltage or the test
lamp glows, there is a short to ground in that gen-
eral area of the wiring harness.
STANDARD PROCEDURE - TESTING FOR
SHORT TO GROUND ON FUSES POWERING
SEVERAL LOADS
(1) Refer to the wiring diagrams and disconnect or
isolate all items on the suspected fused circuits.
(2) Replace the blown fuse.
(3) Supply power to the fuse by turning ON the
ignition switch or re-connecting the battery.
(4) Start connecting the items in the fuse circuit
one at a time. When the fuse blows the circuit with
the short to ground has been isolated.
STANDARD PROCEDURE - TESTING FOR A
VOLTAGE DROP
(1) Connect the positive lead of the voltmeter to
the side of the circuit closest to the battery (Fig. 7).
(2) Connect the other lead of the voltmeter to the
other side of the switch or component.
(3) Operate the item.
(4) The voltmeter will show the difference in volt-
age between the two points.
SPECIAL TOOLS
SPECIAL TOOLS - WIRING/TERMINAL
Fig. 6 Testing for Continuity
1 - FUSE REMOVED FROM CIRCUIT
Fig. 7 Testing for Voltage Drop
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8Wa-01 WIRING DIAGRAM INFORMATION
8Wa - 01 - 7
WIRING DIAGRAM INFORMATION (Continued)
2001 JEEP CHEROKEE
CONNECTOR - AUGAT
REMOVAL
(1) Disconnect battery.
(2) Disconnect the connector from its mating half/
component.
(3) Push down on the yellow connector locking tab
to release the terminals (Fig. 8).
(4) Using special tool 6932, push the terminal to
remove it from the connector (Fig. 9).
(5) Repair or replace the terminal as necessary.
PROBING TOOL PACKAGE 6807
TERMINAL PICK 6680
TERMINAL REMOVING TOOL 6932
TERMINAL REMOVING TOOL 6934
Fig. 8 AUGAT CONNECTOR REPAIR
1 - LOCKING TAB
2 - CONNECTOR
Fig. 9 USING
1 - SPECIAL TOOL 6932
2 - CONNECTOR
8Wa - 01 - 8
8Wa-01 WIRING DIAGRAM INFORMATION
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CONNECTOR - AUGAT (Continued)
2001 JEEP CHEROKEE
INSTALLATION
(1) Reset the terminal locking tang.
(2) Insert the removed wire in the same cavity on
the repair connector.
(3) Repeat steps for each wire in the connector,
being sure that all wires are inserted into the proper
cavities. For additional connector pin-out identifica-
tion, refer to the wiring diagrams.
(4) When the connector is re-assembled, the lock-
ing tab must be placed in the locked position to pre-
vent terminal push out.
(5) Connect connector to its mating half/component.
(6) Connect battery and test all affected systems.
CONNECTOR - MOLEX
REMOVAL
(1) Disconnect battery.
(2) Disconnect the connector from its mating half/
component.
(3) Insert special tool 6742 into the terminal end of
the connector (Fig. 10).
(4) Using special tool 6742, release the locking fin-
gers on the terminal (Fig. 11).
(5) Pull on the wire to remove it from the connector.
(6) Repair or replace the terminal as necessary.
INSTALLATION
(1) Reset the terminal locking tang.
(2) Insert the removed wire in the same cavity on
the repair connector.
(3) Repeat steps for each wire in the connector,
being sure that all wires are inserted into the proper
cavities. For additional connector pin-out identifica-
tion, refer to the wiring diagrams.
(4) Connect connector to its mating half/component.
(5) Connect battery and test all affected systems.
CONNECTOR - THOMAS AND
BETTS
REMOVAL
(1) Disconnect battery.
(2) Disconnect the connector from its mating half/
component.
(3) Push in the two lock tabs on the side of the
connector (Fig. 12).
Fig. 10 MOLEX CONNECTOR REPAIR
1 - CONNECTOR
2 - SPECIAL TOOL 6742
Fig. 11 USING SPECIAL TOOL 6742
1 - CONNECTOR
2 - SPECIAL TOOL 6742
Fig. 12 THOMAS AND BETTS CONNECTOR LOCK
RELEASE TABS
1 - LOCK TABS
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8Wa-01 WIRING DIAGRAM INFORMATION
8Wa - 01 - 9
CONNECTOR - AUGAT (Continued)
2001 JEEP CHEROKEE
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