Page 433 of 1938
JUNCTION BLOCK TERMINAL CALL-OUT WITH DRL
CAV. CKT. WIRE
GAUGECOLOR FUNCTION
1 L09 18 BLK/WT BATTERY INTPUT MAIN FEED
2 L61 18 LG LEFT FRONT T/S OUTPUT TO LAMP
3 L60 18 TN RIGHT FRONT T/S OUTPUT TO LAMP
4 L63 18 DG/RD LEFT REAR T/S OUTPUT TO LAMP
5 L62 18 BR/RD RIGHT REAR T/S OUTPUT TO LAMP
6 A22D 20 BK/OR IGNITION INPUT SENSE ONLY
7 L305 22 LB/WT LEFT T/S SWITCH INPUT SENSE ONLY
8 L302 22 LB/YL RIGHT T/S SWITCH INPUT SENSE ONLY
9 L91 22 DB/PK HAZARD SWITCH INPUT SENSE ONLY
10 G09 22 GY/BK PARK BRAKE SWITCH INPUT SENSE ONLY
11 Z01 14 BK GROUND MAIN GRD.
12 L93 22 RD/YL HEADLAMP RELAY SWITCH
INPUTSENSE ONLY
NSTURN SIGNAL AND FLASHERS 8J - 5
DIAGNOSIS AND TESTING (Continued)
Page 434 of 1938

COMBINATION FLASHER DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
SYSTEM WILL NOT FLASH
HAZARD WARNING LAMPS1. FAULTY (20) AMP FUSE N
POWER DISTRIBUTION CENTER
(PDC).
2. FAULTY WIRING CONNECTION
BETWEEN BOTTOM SIDE OF PDC
AND JUNCTION BLOCK.
3. FAULTY GROUND FEED TO
MULTI-FUNCTION SWITCH.
4. FAULTY HAZARD WARNING
SWITCH CONTACT.
5. COMBINATION FLASHER NOT
PLUGGED INTO JUNCTION
BLOCK.
6. FAULTY COMBINATION
FLASHER.
7. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPLACE FAULTY FUSE IN
PDC.
2. REPAIR FAULTY WIRING
CONNECTION FROM PDC TO
JUNCTION BLOCK.
3. REPAIR OR REPLACE FAULTY
GROUND WIRE FEED TO
MULTI-FUNCTION SWITCH.
4. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
5. PLUG COMBINATION FLASHER
INTO JUNCTION BLOCK.
6. REPLACE FAULTY
COMBINATION FLASHER.
7. REPLACE JUNCTION BLOCK.
SYSTEM WILL FLASH HAZARD
WARNING LAMPS BUT WILL
NOT FLASH RIGHT OR LEFT
TURN SIGNAL LAMPS1. FAULTY (10) AMP FUSE IN THE
JUNCTION BLOCK.
2. FAULTY COMBINATION
FLASHER.
3. FAULTY MULTI-FUNCTION
SWITCH CONTACTS.
4. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPLACE FAULTY FUSE IN
JUNCTION BLOCK.
2. REPLACE COMBINATION
FLASHER.
3. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
4. REPLACE JUNCTION BLOCK.
SYSTEM WILL FLASH HAZARD
WARNING LAMPS AND RIGHT
TURN SIGNAL LAMPS, BUT WILL
NOT FLASH LEFT TURN SIGNAL
LAMPS1. FAULTY LEFT TURN SIGNAL
WIRING CONNECTION BETWEEN
JUNCTION BLOCK AND MULTI-
FUNCTION SWITCH.
2. FAULTY COMBINATION
FLASHER.
3. FAULTY MULTI-FUNCTION
SWITCH CONTACTS.
4. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
JUNCTION BLOCK AND MULTI-
FUNCTION SWITCH.
2. REPLACE COMBINATION
FLASHER.
3. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
4. REPLACE JUNCTION BLOCK.
RIGHT TURN SIGNAL
OPERATES PROPERLY BUT
LEFT TURN SIGNAL FLASHES
FAST1. FAULTY LEFT FRONT OR LEFT
REAR TURN SIGNAL LAMP.
2. FAULTY WIRING CONNECTION
FROM JUNCTION BLOCK TO LEFT
FRONT OR LEFT REAR TURN
SIGNAL LAMP.
3. FAULTY GROUND WIRING
CONNECTION FROM LEFT
FRONT OR LEFT REAR TURN
SIGNAL LAMP.
4. FAULTY MULTI-FUNCTION
SWITCH CONTACTS.
5. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPLACE LEFT FRONT OR
LEFT REAR TURN SIGNAL LAMP.
2. REPAIR OR REPLACE WIRING
CONNECTION FROM JUNCTION
BLOCK TO LEFT FRONT OR LEFT
REAR TURN SIGNAL LAMP.
3. REPAIR OR REPLACE FAULTY
GROUND WIRING CONNECTION
TO LEFT FRONT OR LEFT REAR
TURN SIGNAL LAMP.
4. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
5. REPLACE JUNCTION BLOCK.
8J - 6 TURN SIGNAL AND FLASHERSNS
DIAGNOSIS AND TESTING (Continued)
Page 435 of 1938

CONDITION POSSIBLE CAUSES CORRECTION
LEFT TURN SIGNAL OPERATES
PROPERLY BUT RIGHT TURN
SIGNAL FLASHES FAST1. FAULTY RIGHT FRONT OR
RIGHT REAR TURN SIGNAL LAMP.
2. FAULTY WIRING CONNECTION
FROM JUNCTION BLOCK TO
RIGHT FRONT OR RIGHT REAR
TURN SIGNAL LAMP.
3. FAULTY GROUND WIRING
CONNECTION FROM RIGHT
FRONT OR RIGHT REAR TURN
SIGNAL LAMP.
4. FAULTY MULTI-FUNCTION
SWITCH CONTACTS.
5. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPLACE RIGHT FRONT OR
RIGHT REAR TURN SIGNAL LAMP.
2. REPAIR OR REPLACE WIRING
CONNECTION FROM JUNCTION
BLOCK TO RIGHT FRONT OR
RIGHT REAR TURN SIGNAL LAMP.
3. REPAIR OR REPLACE FAULTY
GROUND WIRING CONNECTION
TO RIGHT FRONT OR RIGHT
REAR TURN SIGNAL LAMP.
4. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
5. REPLACE JUNCTION BLOCK.
BOTH TURN SIGNAL
INDICATORS IN MESSAGE
CENTER DO NOT FLASH IN
CONJUNCTION WITH OUTSIDE
TURN SIGNAL LAMPS1. FAULTY GROUND WIRING
CONNECTION FROM COWL
GROUND SPLICE.1. REPAIR OR REPLACE WIRING
CONNECTION FROM COWL
GROUND SPLICE.
LEFT OR RIGHT TURN SIGNAL
INDICATOR IN MESSAGE
CENTER DOES NOT FLASH IN
CONJUNCTION WITH OUTSIDE
TURN SIGNAL LAMPS, BUT
OTHER INDICATOR PERFORMS
PROPERLY1. FAULTY INDICATOR LAMP IN
MESSAGE CENTER.
2. FAULTY WIRING CONNECTION
BETWEEN MESSAGE CENTER
AND JUNCTION BLOCK.1. REPLACE FAULTY INDICATOR
LAMP IN MESSAGE CENTER.
2. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
MESSAGE CENTER AND
JUNCTION BLOCK.
NSTURN SIGNAL AND FLASHERS 8J - 7
DIAGNOSIS AND TESTING (Continued)
Page 436 of 1938

COMBINATION FLASHER DIAGNOSIS WITH DRL
CONDITION POSSIBLE CAUSES CORRECTION
SYSTEM WILL NOT FLASH
HAZARD WARNING LAMPS1. FAULTY (20) AMP FUSE N
POWER DISTRIBUTION CENTER
(PDC).
2. FAULTY WIRING CONNECTION
BETWEEN BOTTOM SIDE OF PDC
AND JUNCTION BLOCK.
3. FAULTY GROUND FEED TO
MULTI-FUNCTION SWITCH.
4. FAULTY HAZARD WARNING
SWITCH CONTACT.
5. COMBINATION FLASHER/DRL
MODULE NOT PLUGGED INTO
JUNCTION BLOCK.
6. FAULTY COMBINATION
FLASHER/DRL MODULE.
7. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPLACE FAULTY FUSE IN
PDC.
2. REPAIR FAULTY WIRING
CONNECTION FROM PDC TO
JUNCTION BLOCK.
3. REPAIR OR REPLACE FAULTY
GROUND WIRE FEED TO
MULTI-FUNCTION SWITCH.
4. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
5. PLUG COMBINATION FLASHER/
DRL MODULE INTO JUNCTION
BLOCK.
6. REPLACE FAULTY
COMBINATION FLASHER/DRL
MODULE.
7. REPLACE JUNCTION BLOCK.
SYSTEM WILL FLASH HAZARD
WARNING LAMPS BUT WILL
NOT FLASH RIGHT OR LEFT
TURN SIGNAL LAMPS1. FAULTY (10) AMP FUSE IN THE
JUNCTION BLOCK.
2. FAULTY COMBINATION
FLASHER/DRL MODULE.
3. FAULTY MULTI-FUNCTION
SWITCH CONTACTS.
4. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPLACE FAULTY FUSE IN
JUNCTION BLOCK.
2. REPLACE COMBINATION
FLASHER/DRL MODULE.
3. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
4. REPLACE JUNCTION BLOCK.
RIGHT TURN SIGNAL
OPERATES PROPERLY BUT
LEFT TURN SIGNAL FLASHES
FAST
(Hazard mode can be used for a
system check)1. FAULTY LEFT FRONT OR LEFT
REAR TURN SIGNAL LAMP.
2. FAULTY WIRING CONNECTION
FROM JUNCTION BLOCK TO LEFT
FRONT OR LEFT REAR TURN
SIGNAL LAMP.
3. FAULTY GROUND WIRING
CONNECTION FROM LEFT
FRONT OR LEFT REAR TURN
SIGNAL LAMP.
4. FAULTY MULTI-FUNCTION
SWITCH CONTACTS.
5. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPLACE LEFT FRONT OR
LEFT REAR TURN SIGNAL LAMP.
2. REPAIR OR REPLACE WIRING
CONNECTION FROM JUNCTION
BLOCK TO LEFT FRONT OR LEFT
REAR TURN SIGNAL LAMP.
3. REPAIR OR REPLACE FAULTY
GROUND WIRING CONNECTION
TO LEFT FRONT OR LEFT REAR
TURN SIGNAL LAMP.
4. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
5. REPLACE JUNCTION BLOCK.
8J - 8 TURN SIGNAL AND FLASHERSNS
DIAGNOSIS AND TESTING (Continued)
Page 437 of 1938

CONDITION POSSIBLE CAUSES CORRECTION
LEFT TURN SIGNAL OPERATES
PROPERLY BUT RIGHT TURN
SIGNAL FLASHES FAST
(Hazard mode can be used for a
system check)1. FAULTY RIGHT FRONT OR
RIGHT REAR TURN SIGNAL LAMP.
2. FAULTY WIRING CONNECTION
FROM JUNCTION BLOCK TO
RIGHT FRONT OR RIGHT REAR
TURN SIGNAL LAMP.
3. FAULTY GROUND WIRING
CONNECTION FROM RIGHT
FRONT OR RIGHT REAR TURN
SIGNAL LAMP.
4. FAULTY MULTI-FUNCTION
SWITCH CONTACTS.
5. FAULTY TERMINALS IN
JUNCTION BLOCK.1. REPLACE RIGHT FRONT OR
RIGHT REAR TURN SIGNAL LAMP.
2. REPAIR OR REPLACE WIRING
CONNECTION FROM JUNCTION
BLOCK TO RIGHT FRONT OR
RIGHT REAR TURN SIGNAL LAMP.
3. REPAIR OR REPLACE FAULTY
GROUND WIRING CONNECTION
TO RIGHT FRONT OR RIGHT
REAR TURN SIGNAL LAMP.
4. REPLACE FAULTY MULTI-
FUNCTION SWITCH.
5. REPLACE JUNCTION BLOCK.
BOTH TURN SIGNAL
INDICATORS IN MESSAGE
CENTER DO NOT FLASH IN
CONJUNCTION WITH OUTSIDE
TURN SIGNAL LAMPS1. FAULTY GROUND WIRING
CONNECTION FROM COWL
GROUND SPLICE.1. REPAIR OR REPLACE WIRING
CONNECTION FROM COWL
GROUND SPLICE.
LEFT OR RIGHT TURN SIGNAL
INDICATOR IN MESSAGE
CENTER DOES NOT FLASH IN
CONJUNCTION WITH OUTSIDE
TURN SIGNAL LAMPS, BUT
OTHER INDICATOR PERFORMS
PROPERLY1. FAULTY INDICATOR LAMP IN
MESSAGE CENTER.
2. FAULTY WIRING CONNECTION
BETWEEN MESSAGE CENTER
AND JUNCTION BLOCK.1. REPLACE FAULTY INDICATOR
LAMP IN MESSAGE CENTER.
2. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
MESSAGE CENTER AND
JUNCTION BLOCK.
NSTURN SIGNAL AND FLASHERS 8J - 9
DIAGNOSIS AND TESTING (Continued)
Page 438 of 1938

CONDITION POSSIBLE CAUSES CORRECTION
TURN SIGNAL AND HAZARD
WARNING FLASHERS
FUNCTION PROPERLY BUT
DAYTIME RUNNING LIGHTS
(DRL) DO NOT COME ON WHILE
DRIVING
(The brake lamp in the message
center remains illuminated under
the circumstances noted to the
right in step #3.0 through 3.5
unless the lamp is burned out.)
(Headlamps, either low or high
beam, remain illuminated under
the circumstances noted to the
right in step #4.0 through 4.3 even
though the headlamp switch is
OFF.)1. FAULTY GROUND FEED TO
JUNCTION BLOCK FROM
GROUND STUD CONNECTOR
THROUGH I/P HARNESS.
2. FAULTY GROUND FEED
THROUGH JUNCTION BLOCK TO
CAVITY #11 IN POSITION #3 OF
THE JUNCTION BLOCK.
3.0. FAULTY PARK BRAKE
SWITCH.
3.1. PARK BRAKE INPUT CIRCUIT
FALSELY GROUNDED. COULD BE
THE G09 CIRCUIT WHICH IS A
(20) GA. GY/BK WIRE BETWEEN
THE MESSAGE CENTER AND THE
JUNCTION BLOCK,
3.2. OR BETWEEN THE PARK
BRAKE SWITCH AND THE
JUNCTION BLOCK,
3.3. OR BETWEEN THE BRAKE
PRESSURE SWITCH AND THE
JUNCTION BLOCK,
3.4. OR BETWEEN THE IGNITION
SWITCH AND THE JUNCTION
BLOCK,
3.5. OR A SHORTED IGNITION
SWITCH (CONTACT SHOULD
ONLY BE MADE WHEN IN START
POSITION).
4.0. L93 CIRCUIT FALSELY
GROUNDED BETWEEN JUNCTION
BLOCK AND MULTI-FUNCTION
SWITCH.
4.1. L307 CIRCUIT FALSELY
GROUNDED BETWEEN
HEADLAMP SWITCH AND BODY
CONTROL MODULE.
4.2. HEADLAMP SWITCH
SHORTED.
4.3. HEADLAMP CONTROL
OUTPUT FALSELY GROUNDED BY
BODY CONTROL MODULE.1. REPLACE GROUND CIRCUIT TO
JUNCTION BLOCK.
2. REPLACE JUNCTION BLOCK.
3.0. REPLACE THE PARK BRAKE
SWITCH.
3.1-3.4. REPAIR THE G09 CIRCUIT
TO ELIMINATE THE FALSE
GROUND SOURCE.
3.5. REPLACE IGNITION SWITCH.
4.0. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
JUNCTION BLOCK AND MULTI-
FUNCTION SWITCH.
4.1. REPAIR OR REPLACE FAULTY
WIRING CONNECTION BETWEEN
HEADLAMP SWITCH AND BODY
CONTROL MODULE.
4.2. REPLACE SHORTED
HEADLAMP SWITCH.
4.3. REPLACE BODY CONTROL
MODULE.
8J - 10 TURN SIGNAL AND FLASHERSNS
DIAGNOSIS AND TESTING (Continued)
Page 439 of 1938

REMOVAL AND INSTALLATION
MULTI-FUNCTION SWITCH
WARNING: BEFORE SERVICING A STEERING COL-
UMN EQUIPPED WITH AN AIRBAG REFER TO
GROUP 8M, RESTRAINT SYSTEMS FOR PROPER
AND SAFE SERVICE PROCEDURES.
REMOVAL
(1) Release hood latch and open hood.
(2) Disconnect and isolate battery negative cable.
(3) Remove upper and lower steering column
shrouds, refer to Group 19, Steering for proper pro-
cedures.
(4) Disconnect wire connector from back of turn
signal multi-function switch (Fig. 6).
(5) Remove screws holding turn signal switch to
steering column adapter collar.
(6) Remove turn signal switch.
INSTALLATION
For installation, reverse the above procedures. Ver-
ify switch operation by placing the control stalk in
either the right or left position and turning the steer-
ing wheel to ensure the automatic cancellation of the
switch.
COMBINATION FLASHER WITH / WITHOUT DRL
MODULE
REMOVAL
(1) Remove lower steering column cover.
(2) Remove knee blocker.(3) Pull combination flasher from junction block.
INSTALLATION
For installation, reverse the above procedures.
Fig. 6 Turn Signal Multi-Function Switch
NSTURN SIGNAL AND FLASHERS 8J - 11
Page 440 of 1938