1991 ACURA NSX turn signal bulb

Side Marker/Turn Signal/Hazard Flash System

Turn Signal/Hazard Relay Input Test

1. Remove the dashboard lower cover. Remove the turn signal/hazard relay from the left kick panel, then dis-
connect the 6-P connector.
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 in-
put tests at the connector. If any test indicates a problem, find and cor-
rect the cause, then recheck the system. If all the input tests prove OK, the control unit
must be faulty; replace it.
View from
wire side
TURN/SIGNAL

HAZARD RELAY

1

2

3

4
5

6
B

(RED/WHT)

SR

(BLU/YEL)

SL

(BLU/GRN)

SR

(BLU/YEL)

SL

(BLU/GRN)

LR

(GRN/YEL)

LL

(GRN/BLU)
Test condition
Under all conditions.

Ignition switch ON

and turn signal
switch in right position.

Ignition switch ON

and turn signal switch in left
position.
Connect the B termi-

nal to the LR

terminal.
Connect the B termi-

nal to the LL

terminal.
Test: Desired result
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.
Right turn signal lights should come

on.

Left turn signal lights should come

on.
Possible cause if result is not obtained
Poor ground (G401, G402).
An open in the wire.
Blown No. 46 (10 A) fuse.
An open in the wire.
Blown No. 5 (10 A) fuse.
Faulty turn signal switch or cancel

unit.

An open in the wire.
Faulty hazard warning switch.
An open in the wire.
Blown bulb.
Faulty side marker flasher circuit.
Poor ground (G301, G401, G402,

G551).

An open in the wire.
Blown bulb.
Faulty side marker flasher circuit.
Poor ground (G301, G401, G402,

G551).

An open in the wire.

E

(BLK)

Terminal

No.

Under all conditions.
Hazard warning
switch ON.ProCarManuals.com

Cancel Unit Input Test
1. Remove the steering column covers. Disconnect the 10-P 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 in-
put tests at the connector. If any test indicates a problem, find and cor-
rect the cause, then recheck the system. If all the input tests prove OK, the control unit
must be faulty; replace it.
C9 (GRN/BLK)

C10
(BLK)
10-P CONNECTOR

TURN SIGNAL

CANCEL UNIT

C7 (BLU/YEL)
C5
(PUR)
C3(ORN)
C1
(YEL)

View

from

wire

side

C2
(BRN)

C4
(WHT)

C6
(GRY)
C8 (BLU/GRN)

Test condition
Under all conditions.

Ignition switch ON.

Headlight switch
Turn signal switch in right position.
Turn signal switch in
left position.
Under all conditions.
Connect the C1
terminal to the C7
terminal, then turn

the ignition switch
ON.

Connect the C1
terminal to the C8
terminal, then turn

the ignition switch

ON.
Test: Desired result
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 continuity between the
C2 and C6 terminals:
There should be continuity.
Check for continuity between the
C2 and C9 terminals:
There should be continuity.
Check for continuity between the
C3 and C4 terminals:
There should be continuity.
Right turn signal lights should come

on.

Left turn signal lights should come

on.
Possible cause if result is not obtained
Poor ground (G401, G402).
An open in the wire.
Blown No. 5 (10 A) fuse.
An open in the wire.
Faulty headlight switch or taillight

relay.

An open in the wire.
Faulty turn signal switch.
An open in the wire.
Faulty turn signal switch.
An open in the wire.
Faulty cancel solenoid.
An open in the wire.
Blown bulb.
Faulty turn signal/hazard relay.
Poor ground (G301, G401, G402,

G551).

An open in the wire.
Blown bulb.
Faulty turn signal/hazard relay.
Poor ground (G301, G401, G402,

G551).

An open in the wire.

No.


Terminal

C10

(BLK)

1

2

C1

(YEL)

C5

(PUR)

3

4


C2

(BRN)

C6

(GRY)

5

C2

(BRN)
C9

(GRN/BLK)

6

C3

(ORN)

C4

(WHT)

7

C7

(BLU/YEL)

C8

(BLU/GRN)ProCarManuals.com

6. Remove the 4 screws from the lighting switch.

7. Disconnect the 10-P connector from the cancel unit,

then remove the lighting switch.
Lighting Switch Light Bulb Replacement

1. Remove the steering column covers.

2. Remove the 2 screws.

3. Slide the lighting switch out of the housing as shown.

4. Remove the bulb from the lighting switch by turning

the bulb 45°.

BULB (0.91 W)
HOUSING
LIGHTING SWITCH

10-P CONNECTOR

16-P CONNECTOR
CANSEL SWITCH

8. If necessary, remove the cancel unit and cancel switch.

TURN SIGNAL

CANCEL UNIT
TURN SIGNAL

CANCEL SWITCH
LIGHTING SWITCHProCarManuals.com