1991 ACURA NSX Service Repair Manual

Headlight Relay Test

1. Remove the headlight relay from the under-hood

fuse/relay box.

2. Check continuity at the relay terminals.

• There should be continuity between the C and D

terminals.

• There should be continuity between the A and B

terminals when power and ground are connect-

ed to the C and D terminals.

• There should be no continuity between the A and

B terminals when power is disconnected.
Dimmer Relay Test

1. Remove the dimmer relay from the under-hood

fuse/relay box.

2. Check continuity at the relay terminals.

• There should be continuity between the F and E

terminals and between the B and C terminals.

• There should be continuity between the A and C

terminals when power and ground are connect-

ed to the E and F terminals.

• There should be no continuity between the A and

C terminals when power is disconnected.ProCarManuals.com

Lighting Syste m
Retracto r Rela y Tes t
1. Remov e th e retracto r rela y (locate d a t th e righ t sid e
o f th e fron t compartmen t area) .
2 . Chec k continuit y a t th e rela y terminals .
• Ther e shoul d b e continuit y betwee n th e E an d F
terminal s an d betwee n th e B an d C terminals .
• Ther e shoul d b e continuit y betwee n th e A an d C
terminal s whe n powe r an d groun d ar e connect -
e d t o th e E an d F terminals .
• Ther e shoul d b e n o continuit y betwee n th e A an d
C terminal s whe n powe r i s disconnected .
Retractor Cut/Tailligh t Rela y Tes t
1. Remov e th e retracto r cu t rela y an d tailligh t relay .
2 . Chec k continuit y a t th e rela y terminals .
• Ther e shoul d b e continuit y betwee n th e C an d D
terminals .
• Ther e shoul d b e continuit y betwee n th e A an d B
terminal s whe n powe r an d groun d ar e connect -
e d t o th e C an d D terminals .
• Ther e shoul d b e n o continuit y betwee n th e A an d
B terminal s whe n powe r i s disconnected .
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Headlights

Description

The light first forms basic pattern A after being interrupt-

ed by the interrupter plate and passed through the con-

vex lens. The interrupter plate determines the form.

The outer lens distributes the light into pattern B.

Screen
CONVEX LENS

INTERRUPTER PLATE

BULB

REFLECTOR

OUTER LENSProCarManuals.com

Headlights

Adjustment

Adjust the headlights to local requirements by turning the adjusters as shown.

NOTE: Be careful not to damage the front fender or the

headlight housing when adjusting.

HEADLIGHT HORIZONTAL

AIM ADJUSTER

HEADLIGHT VERTICAL

AIM ADJUSTER
PROTECTIVE TAPEProCarManuals.com

Headlight 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 No. 42 (15 A) and No. 43 (15 A) fuses

from the under-hood fuse/relay box.

No. 43
(15A)

FUSE

No. 42
(15A)

FUSE

UNDER-HOOD FUSE/RELAY BOX

2. Remove the cap, and turn the knob clockwise to

raise the headlight.

CAP

RETRACTOR

KNOB
3. Remove the two caps, four screws, and cowl clips.

COWL CLIP

CAPS

SCREW

4. Slide the headlight housing forward and up to re-

move it. Be careful not to damage the bumper or the

housing.

HEADLIGHT HOUSING

PROTECTIVE TAPE

5. Disconnect the 6-P connector from the headlight

unit.

6-P CONNECTOR

MOUNTING

BOLTS

HEADLIGHT UNIT

6. Remove the four mounting bolts, then remove the

headlight unit.

7. After installing the new headlight, adjust both head-

lights to local requirements.ProCarManuals.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:
60
W/LO:
51 W)

BULB CAP

2-P CONNECTOR

2. Disconnect the 2-P connector, then remove the re-

taining spring and bulb.
Daytime Running Lights

(Canada)

Replacement

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

light, then disconnect the 2-P connector.

2-P

CONNECTOR

BOLT
DAYTIME RUNNING LIGHT

2. If necessary, replace the bulb.

DAYTIME RUNNING

LIGHT

BULB (32CP)

SOCKET
RETAINING SPRING
Do not touch

the glass.ProCarManuals.com

Front Tur n Signal/Fron t
Parkin g Light s
Replacemen t
1. Remov e th e scre w an d pul l th e ligh t assembl y ou t
o f th e fron t bumper .
SCREW
2. Disconnec t th e 2- P connector s fro m th e bul b
sockets .
2-P CONNECTOR S
FRON T PARKIN G LIGH T
BUL B (5W )
BULBSOCKE T
FRON T TUR N SIGNA L
LIGH T BUL B (45CP )
HOUSIN G
3. Tur n th e bul b socket s 45 ° counterclockwis e t o re -
mov e the m fro m th e housing .
Front Sid e Marke r
Lights
Replacemen t
1. Carefull y pr y th e fron t sid e marke r ligh t ou t o f th e
fron t fender . B e carefu l no t t o damag e th e fron t sid e
marke r ligh t o r th e fron t fender .
PROTECTIV E CLOT H
FRON T SID E MARKE R LIGH T
2. Disconnec t th e 2- P connecto r fro m th e fron t sid e
marke r light .
2-P CONNECTO R
HOUSIN G
3. Tur n th e bul b socke t 45 ° counterclockwis e t o re -
mov e i t fro m th e housing .
BULB (3CP )
ProCarManuals.com

Taillights

Replacement

1. Open the trunk lid, and remove the rear trim panel.

2. Disconnect the 8-P connector and 2-P connector

from the taillight assembly.

3. Disconnect the 2-P connector from the trunk key

cylinder switch.

8-P CONNECTOR

2-P CONNECTOR

TRUNK KEY CYLINDER

CONNECTOR

REAR TRIM PANEL

4. Remove the four mounting nuts and rear panel, then

remove the ten mounting nuts and the taillight as-

sembly.

NEW GASKET

REAR PANEL

TAILLIGHT ASSEMBLY

5. Inspect the gasket; if it is distorted or stays com-

pressed, replace it.

6. After installing, run water over the lights to make

sure they don't leak.
Bulb Replacement

1. Open the trunk lid, and remove the rear trim panel.

2. Turn each socket 45° counterclockwise to remove

them from the taillight housing.

SOCKET

TURN SIGNAL LIGHT BULB (45CP)

and BRAKE LIGHT/TAILLIGHT BULBS (32CP/2CP)

TAILLIGHT BULB (2CP)

BACK-UP LIGHT BULB (32CP)

3. Remove the bulbs from the sockets.ProCarManuals.com