Page 1329 of 1503
UNDER-HOOD FUSE/RELA Y BO X
DIMME R RELA Y
Test , pag e 23-19 1
TAILLIGH T RELA YTest, pag e 23-19 2
RIGH T HEADLIGH T
RETRACTO R MOTO R
Test , pag e 23-190
Replacement , pag e
23-18 8
HEADLIGH T RELA YTest, pag e 23-19 1
LEF T HEADLIGH T
RETRACTO R RELA YTest, pag e 23-19 2
RIGH T HEADLIGH T
RETRACTO R RELA YTest, pag e 23-19 2
RIGH T DAYTIM E RUNNIN G
LIGH T (Canada )
Replacement , page , 23-19 6 LEF
T HEADLIGH T
RETRACTO R MOTO R
Test , pag e 23-19 0
Replacement , pag e 23-18 8
HEADLIGHT SAdjustment, pag e 23-19 4
Replacement , pag e 23-19 5
LEFT DAYTIM E RUNNIN G LIGH T (Canada )
Replacement , pag e 23-19 6
ProCarManuals.com
Page 1330 of 1503
Switches
The lighting system is controlled by five switches and the turn signal cancel unit.
HEADLIGHT SWITCH
HAZARD WARNING SWITCH
TURN SIGNAL and DIMMER SWITCH
TURN SIGNAL CANCEL SWITCH
TURN SIGNAL CANCEL UNITProCarManuals.com
Page 1331 of 1503

Lighting System
Retractable Headlight Control Unit Input Test
Remove the rear bulkhead panels, and disconnect the
18P connector from the control unit.
Inspect the connector and socket terminals to be sure
they are all making good contact.
If the terminals are bent, loose, or corroded, repair
them as necessary, and recheck the system.
If the terminals look OK, make the following input
tests at the connector.
— If any test indicates a problem, find and correct
the cause, then recheck the system.
— If all the input tests prove OK, the control unit
must be faulty; replace it.
BLU/RED
Wire Test condition Test: Desired result Possible cause if result is not obtained
BLK1
BLK2
RED/GRN2
WHT/GRN
YEL/WHT
PNK/BLK
RED/YEL'
RED/GRN1
Under all conditions
Headlight switch OFF and
retractor switch OFF
Retractor switch OFF
Retractor switch ON
Headlight switch
(headlights on)
Headlight switch
(headlights on)
Check for continuity to ground:
There should be continuity.
Check for voltage to ground:
There should be battery
voltage.
Check for voltage to ground:
There should be battery
voltage.
Check for voltage to ground:
There should be battery
voltage.
Check for voltage to ground:
There should be battery
voltage.
Check for voltage to ground:
There should be battery
voltage.
• Poor ground (G401, G402, G403)
• An open in the wire
• Poor ground (G401, G402, G403)
• An open in the wire
• Blown No. 42 (15 A) and No. 43 (15 A)
fuses
• Faulty retractor switch or headlight
switch
• An open in the wire
• Blown No. 42 (15 A) and No. 43 (15 A)
fuses
• Faulty retractor switch
• An open in the wire
• Blown No. 42 (15 A) and No. 43 (15 A)
fuses
• Faulty retractor switch
• An open in the wire
• Blown No. 43 (15 A) fuse
• Faulty headlight switch
• An open in the wire
• Blown No. 52 (20 A) fuse
• Faulty headlight relay or headlight
switch
• An open in the wire
• Blown No. 49 (20 A) fuse
• Faulty headlight relay or headlight
switch
• An open in the wire
NOTE: Different wires with the same color have
been given a number suffix to distinguish them
(for example, RED/YEL1 and RED/YEL4 are not the
same).ProCarManuals.com
Page 1332 of 1503

Wire
Test condition
Test: Desired result
Possible cause if result is not obtained
LT
GRN/
RED
Passing switch ON
Check for voltage to ground:
There should be battery voltage.
• Faulty headlight relay or passing
switch
• An open in the wire
BLU/RED
Retractor motor stationary
Check for voltage to ground:
There should be battery volt-
age.
• Blown No. 42 (15 A) fuse
• Faulty right retractor relay
• An open in the wire
BLU1
• Blown No. 43 (15 A) fuse
• Faulty left retractor relay
• An open in the wire
Under all conditions
YEL
Check for continuity to ground:
There should be continuity.
• Faulty right retractor cut relay
• Poor ground (G202)
• An open in the wire
YEL/GRN
• Faulty left retractor cut relay
• Poor ground (G202)
• An open in the wire
Ignition switch ON
RED/YEL4
Connect battery power:
The retractable headlight mal-
function indicator should come
on.
• Faulty safety indicator circuit
• An open in the wire
Headlight retractor switch
OFF (retractable headlight
closed)
Connect an ohmmeter with
the negative lead to the
WHT/YEL terminal, and the
positive lead to the
GRN/WHT (orYEL/BLU)
terminal.
Check that there is no continuity
between the WHT/YEL and the
GRN/WHT (or YEL/BLU) termi-
nals.
• Faulty headlight retractor motor
Raise the headlights halfway
by turning the retractor knob
clockwise.
Check for continuity between the
WHT/YEL and the GRN/WHT1 (or
YEL/BLU) terminals: There
should be continuity.
• Faulty headlight retractor motor
• An open in the wire
Turn the retractor knob
clockwise until the head-
lights are fully raised.
Check for continuity between the
WHT/YEL and the GRN/WHT1 (or
YEL/BLU) terminals: There
should be continuity.
• Faulty headlight retractor motor
• An open in the wire
Headlight retractor switch
OFF (retractable headlight
closed)
Connect an ohmmeter nega-
tive lead to the YEL/WHT
terminal, and the positive
lead to the GRN/WHT' (or
YEL/BLU) terminal.
Check for continuity between
the YEL/WHT and the GRN/
WHT1 (or YEL/BLU) terminals:
There should be continuity.
• Faulty headlight retractor motor
• An open in the wire
Raise the headlights halfway
by turning the retractor knob
clockwise.
Check for continuity between the
YEL/WHT and the GRN/WHT1 (or
YEL/BLU) terminals: There
should be continuity.
• Faulty headlight retractor motor
• An open in the wire
Turn the retractor knob
clockwise until the head-
lights are fully raised.
Check that there is no continuity
between the YEL/WHT and the
GRN/WHT1 (or YEL/BLU) termi-
nals.
• Faulty headlight retractor motor
GRN/WHT1
(YEL/BLU)
WHT/YEL
GRN/WHT1
(YEL/BLU)
YEL/WHTProCarManuals.com
Page 1333 of 1503

Lighting Syste m
Daytim e Runnin g Light s Contro l Uni t Inpu t Tes t (Canada )
Remove th e glov e bo x lowe r pane l an d glov e box .
Disconnec t th e 4 P an d 8 P connector s fro m th e daytim e
runnin g light s contro l unit .
Inspec t th e connecto r an d socke t terminal s t o b e sur e
the y ar e al l makin g goo d contact .
I f th e terminal s ar e bent , loose, or corroded , repai r
the m as necessary , an d rechec k th e system .
I f th e terminal s loo k OK , mak e th e followin g inpu t
test s a t th e connector .
— If an y tes t indicate s a problem , fin d an d correc t
th e cause , the n rechec k th e system .
— If al l th e inpu t test s prov e OK , th e contro l uni t
mus t b e faulty ; replac e it .
DAYTIM E RUNNIN G LIGHT SCONTRO L UNI T (Canada )
4P CONNECTO R
View fro m wir e sid e
GRN/RED
Wir eTes t conditio n Test: Desire d resul t
Possible caus e if resul t i s no t obtaine d
BLK
PNK/WH T
BLK/RED
PNK/BL K
YEL/BLK
GRN/RE D
GRN/YEL
Under al l condition s
Unde r al l condition s
Ignitio n switc h O N (II )
Headligh t switc h
(headlight s on )
Unde r al l condition s
Ignitio n switc h O N (II )
Parkin g brak e switc h O N
(parkin g brak e leve r up )
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r voltag e t o ground :
Ther e shoul d b e batter y
voltage .
Chec k fo r voltag e t o ground :
Ther e shoul d b e batter y
voltage .
Check fo r voltag e to ground :
Ther e shoul d b e batter y
voltage .
Check fo r continuit y t o ground :
Ther e shoul d b e continuity .
Connec t t o ground : Th e brak e
syste m ligh t shoul d com e on .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .•
Poo r groun d (G401 , G402 , G403 )
• A n ope n in th e wir e
• Blow n No . 4 4 (1 0 A ) fus e
• A n ope n in th e wir e
• Blow n No . 3 (7. 5 A ) fus e
• A n ope n in th e wir e
• Blow n No . 4 3 (1 5 A ) fus e
• Fault y headligh t switc h
• A n ope n in th e wir e
• Blow n daytim e runnin g ligh t bulb s
• Poo r groun d (G301 )
• A n ope n in th e wir e
• Blow n No . 5 (1 5 A ) fus e
• Blow n bul b
• A n ope n i n th e wir e
• Fault y parkin g brak e switc h
• A n ope n in th e wir e
ProCarManuals.com
Page 1334 of 1503
Combination Light/Tur n Signa l Switc h Tes t
1. Remov e th e dashboar d lowe r cove r (se e pag e 23-184 ).
2 . Disconnec t th e 18 P connecto r fro m th e floo r wir e
harness .
3. Chec k fo r continuit y betwee n th e terminals , i n eac h
switc h position , accordin g t o th e table .
Headligh t
witc h
Positio
n
All position s
Terminal
OFF
23457812131 5161 8
Passin gswitchON
HIG H
LOW
Tur n Signa l Switc h
Headlight/Dimmer/Passin
g Switc h
Termina l
Position
RIGHT
NEUTRA L
LEF T
6101 1
Dimme rswitch
Headligh t
switch
ProCarManuals.com
Page 1335 of 1503
Lighting Syste m
Headlight/Tur n Signa l Switc h Replacemen t
SRS component s ar e locate d i n thi s area . Revie w th e
SR S componen t locations , precautions , an d procedure s
i n th e SR S sectio n 24 befor e performin g repair s o r ser -
vice .
1 . Remov e th e dashboar d lowe r cover , an d disconnec t
th e connectors .
2 . Remov e th e dashboar d lowe r pad .
DASHBOAR D LOWE RCOVER
DASHBOAR D LOWE RPAD
3. Remov e the tilt cover .
TILT COVE R
4. Remov e th e steerin g colum n covers .
NOTE : B e carefu l no t t o damag e th e steerin g col -
um n covers .
UPPER COVE R
LOWE R COVE R
ProCarManuals.com
Page 1336 of 1503
5. Disconnect the 18P and 10P connectors.
CAUTION: Be careful not to damage the SRS wire
harness.
6. Remove the six screws, then remove the headlight-
turn signal switch assembly.
HEADLIGHT SWITCH
10P CONNECTOR
18PXJONNECTOR
TURN SIGNAL SWITCH
7. If necessary, remove the turn signal cancel unit and
cancel switch.
TURN SIGNAL
CANCEL UNIT
TURN SIGNAL
CANCEL SWITCH
8. If necessary, remove the headlight switch bulb.
HEADLIGHT SWITCH
BULB (0.91 W)ProCarManuals.com