1997 ACURA NSX headlight bulb

Lighting System

HID Lamp System Troubleshooting

1. Check the No. 49 (20 A) or No. 52 (20 A) fuse in the

main under-hood fuse/relay box.

Are the fuses OK?

YES — Go to step 2.

NO — Replace the fuse (s), and recheck.

2. Substitute a known-good HID bulb and recheck.

Does the headlight low beam come on?

YES — Replace the HID bulb.

NO — Go to step 3.

3. Disconnect the 2P connector from the inverter unit.

4. Turn the combination light switch ON.

5. Measure the voltage between the No. 2 terminal of

the inverter unit 2P connector and body ground.
7. Check for continuity between the No. 1 terminal of

the inverter unit 2P connector and body ground.

Is there continuity?

YES — Substitute a known-good inverter, and

recheck. If the symptom/indication goes away,

replace the original inverter unit.

NO — Repair open in the wire between the inverter

unit and body ground. If the wire is OK, check for

poor ground at G202 or G302.ProCarManuals.com

Front Turn Signal Light:

1. Open the hood.

2. Turn the bulb socket 45° counterclockwise, remove

it from the headlight assembly, then replace the

bulb.

Front Parking Light:

1. Open the hood.

2. Turn the bulb socket 45° counterclockwise, remove

it from the headlight assembly, then replace the

bulb.ProCarManuals.com

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

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

Headlights

Description

The light first forms basic pattern A after being inter-

rupted by the interrupter plate and passing through the

convex lens. The interrupter plate determines the form.

The outer lens distributes the light into pattern B.

CONVEX LENS

INTERRUPTER PLATE

BULB

REFLECTOR

OUTER LENSProCarManuals.com

Headlights

Bulb Replacement

CAUTION:

Halogen headlights can become very hot in use; do

not touch them or the attaching hardware immediately

after they have been turned off.

Do not try to replace or clean the headlights with the

lights on.

1. Remove the bulb cap.

BULB

(HI:
65
W/LO:
55 W)

BULB CAP

2P CONNECTOR

2. Disconnect the 2P connector, then remove the

retaining spring and bulb.
Daytime Running Lights

(Canada)

Replacement

1. Remove the bolt, and pull out the daytime running

light, then disconnect the 2P connector.

2P

CONNECTOR

DAYTIME RUNNING LIGHT

BOLT

2. If necessary, replace the bulb.

DAYTIME RUNNING

LIGHT

BULB (32CP)

SOCKETProCarManuals.com

Cancel Unit Input Test

1. Remove the steering column covers. Disconnect the

10P connector from the turn signal cancel unit.

2. Inspect the connector 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.
10P CONNECTOR
TURN SIGNAL

CANCEL UNIT

Terminal
Test condition
Test: Desired result
Possible cause if result is not obtained

C10

(BLK)
Under all conditions
Check for continuity to ground:

There should be continuity.
• Poor ground (G401, G402, G403)

• An open in the wire

C1

(GRY/RED)
Ignition switch on (II)
Check for voltage to ground:

There should be battery voltage.
• Blown No. 5 (15 A) fuse

• An open in the wire

C5

(PUR)
Headlight switch
Check for voltage to ground:

There should be approx. 5 volt.
• Faulty headlight switch or taillight

relay

• An open in the wire

C2

(BRN)
Turn signal switch in

right position

C6

(GRY)
Check for continuity between the C2

and C6 terminals:

There should be continuity.
• Faulty turn signal switch

• An open in the wire

C2

(BRN)
Turn signal switch in left

position

C9

(GRN/BLK)
Check for continuity between the C2

and C9 terminals:

There should be continuity.
• Faulty turn signal switch

• An open in the wire

C3

(ORN)
Under all conditions

C4

(WHT)
Check for continuity between the C3

and C4 terminals:

There should be continuity.
• Faulty cancel solenoid

• An open in the wire

C7

(BLU/YEL)
Connect the C1 terminal

to the C7 terminal, then

turn the ignition switch

ON
(II).
The right turn signal lights should

come on.
• Blown bulb

• Faulty turn signal/hazard relay

• Poor ground (G301, G401, G402,

G403, G551)

• An open in the wire

C8

(BLU/GRN)
Connect the C1 terminal

to the C8 terminal, then

turn the ignition switch

ON
(II).
The left turn signal lights should

come on.
• Blown bulb

• Faulty turn signal/hazard relay

• Poor ground (G301, G401, G402,

G403, G551)

• An open in the wireProCarManuals.com

1. Remove the dash lights brightness controller from

the instrument panel trim (see previous page).

2. Measure resistance between A and B terminals

while rotating the adjusting dial. Resistance should

vary from 0 to 20,000 ohms as the dial is rotated.

NOTE: Resistance will vary slightly with temperature.

HEADLIGHT

RETRACTOR SWITCH
ADJUSTING

DIAL

DASH LIGHTS

BRIGHTNESS

CONTROLLER
Controller Light Bulb Replacement

1. Remove the dash lights brightness controller.

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

BULB (0.84 W)
Dash Lights Brightness Control

Controller TestProCarManuals.com