Jeep Cherokee 2000 Service Manual - page 383
output circuit cavity of the cigar lighter wire harness
connector. If OK, replace the faulty cigar lighter
receptacle (instrument panel accessory switch bezel
unit). If not OK, refer to Cigar Lighter Relay in
the Diagnosis and Testing section of this group for
further diagnosis.
CIGAR LIGHTER RELAY
The cigar lighter relay (Fig. 3) is located in the
junction block, on the right cowl side inner panel
below the instrument panel in the passenger com-
partment. For complete circuit diagrams, refer to
Horn/Cigar Lighter in the Contents of Group 8W -
Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER
TO
GROUP
8M
-
PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING
WHEEL,
STEERING
COLUMN,
OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Remove the cigar lighter relay from the junc-
tion block. Refer to Cigar Lighter Relay in the
Removal and Installation section of this group for the
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
6
5 ohms. If OK, go to Step
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.
RELAY CIRCUIT TEST
(1) The relay common feed terminal cavity (30) of
the junction block is connected to battery voltage and
should be hot at all times. Check for battery voltage
at the fused B(+) circuit cavity of the accessory relay
wire harness connector. If OK, go to Step 2. If not
OK, repair the fused B(+) circuit to the fuse in the
junction block as required.
(2) The relay normally closed terminal (87A) is
connected to terminal 30 in the de-energized position,
but is not used for this application. Go to Step 3.
(3) The relay normally open terminal (87) is con-
nected to the common feed terminal (30) in the ener-
gized position. This terminal supplies battery voltage
to the cigar lighter when the relay is energized by
the ignition switch. There should be continuity
between the junction block cavity for relay terminal
87 and the cigar lighter relay output circuit cavity of
the cigar lighter wire harness connector at all times.
If OK, go to Step 4. If not OK, repair the open cigar
lighter relay output circuit to the cigar lighter wire
harness connector as required.
(4) The coil battery terminal (86) is connected to
the electromagnet in the relay. It receives battery
feed to energize the cigar lighter relay when the igni-
tion switch is in the Accessory or On positions. Turn
the ignition switch to the On position. Check for bat-
tery voltage at the fused ignition switch output (acc/
run) circuit cavity for relay terminal 86 in the
junction block. If OK, go to Step 5. If not OK, repair
the open fused ignition switch output (acc/run) circuit
to the ignition switch as required.
(5) The coil ground terminal (85) is connected to
the electromagnet in the relay. The junction block
cavity for this terminal should have continuity to
ground at all times. If not OK, repair the open
ground circuit to ground as required.
INSTRUMENT PANEL POWER OUTLET
For complete circuit diagrams, refer to Horn/Ci-
gar Lighter in the Contents of Group 8W - Wiring
Diagrams.
TERMINAL LEGEND
NUMBER
IDENTIFICATION
30
COMMON FEED
85
COIL GROUND
86
COIL BATTERY
87
NORMALLY OPEN
87A
NORMALLY CLOSED
Fig. 3 Cigar Lighter Relay
8E - 12
INSTRUMENT PANEL SYSTEMS
XJ
DIAGNOSIS AND TESTING (Continued)