LIGHTING SYSTEM

T-49prose procedure

Step 4

Step 4 — Measure headlight switch connector voltages

1
Reconnect the headlight connector.
05U0TX-299
2
Remove the column cover.
3
Measure the voltage at the following terminal-wires of the headlight switch connectors (in the combination switch) as shown.

Step 4 — Headlight switch connector voltages

Wire	Headlight switch	Voltage	Action
(R/L)	Any position	12V	Next, check wire (W/R)
(R/L)	Any position	0V	Repair wire (R/L) (HEAD 30A fuse—Headlight switch)
(W/R)	Any position	12V	Next, check wire (R/W)
(W/R)	Any position	0V	Repair wire (W/R) (BTN 40A fuse—Headlight switch)
(R/W)	ON (High beam)	12V	Next, check wire (R/B)
(R/W)	ON (High beam)	0V	Go to Step 5
(R/B)	ON (Low beam)	12V	Check for poor connection of headlight switch connector
(R/B)	ON (Low beam)	0V	Go to Step 5

(R/L)

Headlight switchAny position

Voltage12V

ActionNext, check wire (W/R)

(R/L)

Headlight switchAny position

Voltage0V

ActionRepair wire (R/L) (HEAD 30A fuse—Headlight switch)

(W/R)

Headlight switchAny position

Voltage12V

ActionNext, check wire (R/W)

(W/R)

Headlight switchAny position

Voltage0V

ActionRepair wire (W/R) (BTN 40A fuse—Headlight switch)

(R/W)

Headlight switchON (High beam)

Voltage12V

ActionNext, check wire (R/B)

(R/W)

Headlight switchON (High beam)

Voltage0V

ActionGo to Step 5

(R/B)

Headlight switchON (Low beam)

Voltage12V

ActionCheck for poor connection of headlight switch connector

(R/B)

Headlight switchON (Low beam)

Voltage0V

ActionGo to Step 5

Step 5 — Headlight switch inspection

1
Disconnect the headlight switch connectors.
05U0TX-300
2
Check for continuity between terminals as shown with an ohmmeter.
3
If not as specified, replace the headlight switch.
4
If correct, check for a poor connection in the system.

Step 5 — Headlight switch continuity (O—O: Indicates continuity)

Position group	Position	HB	HL	HU	BA	BTN	TNS
Headlight	Low beam	O	O
Headlight	High beam	O		O
Parking					O		O
Tail, Parking						O	O

Headlight

PositionLow beam

HBO

HLO

BTN

TNS

Headlight

PositionHigh beam

HBO

HUO

BTN

TNS

Parking

Position

BAO

BTN

TNSO

Tail, Parking

Position

BTNO

TNSO

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LIGHTING SYSTEM

Step 4

Step 4 — Measure headlight switch connector voltages

Step 4 — Headlight switch connector voltages

Step 5 — Headlight switch inspection

Step 5 — Headlight switch continuity (O—O: Indicates continuity)

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