Jeep Wrangler 1997 Manual page 341

TURN SIGNAL AND HAZARD WARNING SYSTEMS 8J - 3
DIAGNOSIS AND TESTING (Continued)
TJ
a turn signal bulb that is not lit . Replace that bulb or
repair the circuits to that lamp, as required . Test the
operation of the system again. If the turn indicator(s)
fail to light, go to Step 2 .
(2) Remove and inspect the turn signal fuse in the
fuseblock module, or the hazard warning fuse in the
Power Distribution Center (PDC) . Replace the faulty
fuse(s), if required, and go to Step 3.
(3) Remove the combination flasher from its con-
nector and replace it with a known good unit. Test
the operation of the turn signal and hazard warning
systems . If OK, discard the faulty combination
flasher. If not OK, remove the test flasher and go to
Step 4.
(4) With the ignition switch in the On position,
check for battery voltage at the combination
flasher input circuit cavity in the combination
flasher connector. If OK, go to Step 5 . If not OK, go
to Step 7 .
(5) With the ignition switch in the Off position and
the hazard warning switch in the On position, check
for battery voltage at the combination flasher
input circuit cavity in the combination flasher con-
nector. If OK, go to Step 6 . If not OK, go to Step 7.
(6) With the ignition switch in the Off position,
check for continuity between the ground circuit cav-
ity of the combination flasher connector and a good
ground . There should be continuity. If OK, go to Step
7 . If not OK, repair the circuit to ground as required .
(7) Disconnect the multi-function switch connector
as described in this group . Check for continuity
between the combination flasher input circuit cav-
ities of the combination flasher connector and the
multi-function switch connector. There should be con-
tinuity. If OK, go to Step 8. If not OK, repair the
open circuit as required .
(8) Check for continuity between the combination
flasher output cavities of the combination flasher
connector and the multi-function switch connector.
There should be continuity. If OK, test the multi-
function switch as described in this group . If not OK,
repair the open circuit as required .
MULTI-FUNCTION SWITCH
Perform the diagnosis of the hazard warning
and/or turn signal systems as described in this group
before testing the multi-function switch . For circuit
descriptions and diagrams, see 8W-52 - Turn Signals
in Group 8W - Wiring Diagrams .
WARNING : ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO GROUP 8M
- PASSIVE
RESTRAINT SYSTEMS
BEFORE ATTEMPTING
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) Disconnect the multi-function switch connector
as described in this group .
(2) Using an ohmmeter, perform the switch conti-
nuity checks at the switch terminals as shown in the
Multi-Function Switch Continuity chart (Fig. 2).
SWITCH
POSITION
TURN
SIGNAL
NEUTRAL
LEFT
RIGHT
NEUTRAL
HAZARD
WARNING
OFF
OFF
OFF
ON
CONTINUITY
BETWEEN
FandH
FandK
A and
E
F and H
C and K
C and I
A and E
F and K
C and H
C and J
Aand E
B and E
C and H
C and K
C and I
C and J
H - RIGHT REAR
I - LEFT FRONT
J - RIGHT FRONT
K - LEFT REAR
Fig. 2 Multi-Function Switch Continuity
REMOVAL AND INSTALLATION
COMBINATION FLASHER
948J-12
(3) If the switch fails any of the continuity checks,
replace the faulty switch. If the switch is OK, repair
the lighting circuits as required.
WARNING : ON VEHICLES EQUIPPED WITH AIR-
BAGS,
REFER TO GROUP 8M - PASSIVE
RESTRAINT SYSTEMS BEFORE ATTEMPTING
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) Disconnect and isolate the battery negative
cable.
(2) Remove the lower steering column cover and
knee blocker as described in Group 8E - Instrument
Panel Systems .