1991 ACURA NSX light

Switches

The lighting system is controlled by five switches and the turn signal cancel unit.

HEADLIGHT SWITCH TURN SIGNAL CANCEL UNIT
HAZARD WARNING SWITCH

TURN SIGNAL and DIMMER SWITCH

TURN SIGNAL CANCEL SWITCHProCarManuals.com

Lighting Syste m
Retractabl e Headligh t Contro l Uni t Inpu t Tes t
Remov e th e rea r bulkhea d panels , an d disconnec t th e
18- P connecto r fro m th e 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 , o r corroded , repai r
them 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 .
NOTE : Differen t wire s wit h th e sam e colo r hav e
bee n give n a numbe r suffi x t o distinguish them
(for example , RED/YEL1 an d RED/YEL4 ar e no t th e
same) .
REAR BULKHEA D
RETRACTABL E HEADLIGH T
CONTRO L UNI T
No. Wir e Test conditio n Test: Desire d resul t Possibl e caus e if resul t i s no t obtaine d
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Lighting System

Daytime Running Lights Control Unit Input Test (Canada)

Remove the glove box lower panel and glove box.

Disconnect the 4-P and 8-P connectors from the daytime

running lights 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.
DAYTIME RUNNING LIGHTS

CONTROL UNIT (Canada)

4-P CONNECTOR

View from wire side

No. Wire
Test condition
Test: Desired result

Possible cause if result is not obtained
8-P CONNECTORProCarManuals.com

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 23-182 ).
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 .
18-P CONNECTO R
View fro m wir e sid e
Tur n Signa l Switc h
Headlight/Dimmer/Passin
g Switc h
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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
in 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 th e til t 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 -
umn covers .
UPPER COVE R
LOWE R COVE R
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5. Disconnect the 18-P and 10-P 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

10-P CONNECTOR

18-P CONNECTOR

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

Lighting Syste m
Retracto r Switc h Remova l
SRS component s ar e locate d in 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 service .
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 R
COVE R
3. Remov e the tilt cover .
DASHBOAR D
LOWE R
PAD
TIL T COVE R
4. Remov e th e steerin g colum n covers .
UPPER COVE R
LOWE R COVE R
5. Disconnec t th e 5- P an d 10- P connector s fro m eac h
switch .
TCS SWITC H
5-P CONNECTO R
10- P CONNECTO R RETRACTO R SWITC H
6. Remov e th e si x screws, then remov e th e instrumen t
pane l tri m fro m th e dashboard .
INSTRUMEN T PANE L TRI M
RETRACTO R SWITC H
7. Remov e tw o screws , the n remov e th e retracto r
switc h fro m th e instrumen t pane l trim .
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Retractor Switch Test

1. Remove the retractor switch (see previous page).

2. Check for continuity between the terminals in each

switch position according to the table.

Retractor Switch

RETRACTOR SWITCH

Retractor Switch
Retractor Switch Light Bulb Replacement

1. Remove the retractor switch (see previous page).

2. Turn the bulb 45° counterclockwise to remove it.

RETRACTOR SWITCH

BULB (0.84W)ProCarManuals.com