Lexus GS300/400 (2000 year). Service manual — part 65

I05032

–

BODY ELECTRICAL

POWER SOURCE

BE–23

2324

2.

INSPECT ENGINE ROOM No.3 RELAY BLOCK CIR-
CUIT

Remove the relay from the relay block and inspect the connec-
tor on relay block side.

Fuse

Tester connection

Condition

Specified condition

FAN NO.1

3 – Ground

Ignition switch ON

Battery positive voltage

FAN NO.2

8 – Ground

Ignition switch ON

Battery positive voltage

A/C COMP

13 – Ground

Ignition switch ON

Battery positive voltage

FAN NO.3

17 – Ground

Ignition switch ON

Battery positive voltage

DIMMER

20 – Ground

Constant

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.

I05033

BE–24

–

BODY ELECTRICAL

POWER SOURCE

2325

3.

INSPECT ENGINE ROOM No.2 RELAY BLOCK CIR-
CUIT

Remove the relay from the relay block and inspect the connec-
tor on relay block side.

Relay

Tester connection

Condition

Specified condition

HORN

1 – Ground

Constant

Battery positive voltage

HORN

2 – Ground

Horn switch ON

Continuity

HORN

4 – Ground

Constant

Battery positive voltage

ABS SOL

5 – Ground

Constant

Battery positive voltage

ABS SOL

6 – Ground

Constant

Continuity

TRC MTR

11 – Ground

Constant

Battery positive voltage

ABS MTR

15 – Ground

Constant

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.

I05034

–

BODY ELECTRICAL

POWER SOURCE

BE–25

2326

4.

INSPECT DRIVER SIDE JUNCTION BLOCK CIRCUIT

BE–26

–

BODY ELECTRICAL

POWER SOURCE

2327

(a)

Remove the fuse from the junction block and inspect the
connector on junction block side.

Fuse

Tester connection

Condition

Specified condition

AM1

1 – Ground

Constant

Battery positive voltage

WASHER

3 – Ground

Ignition switch ON

Battery positive voltage

FOG

5 – Ground

Constant

Battery positive voltage

TAIL

7 – Ground

Light control switch TAIL or HEAD

Battery positive voltage

SRS–ACC

9 – Ground

Ignition switch ACC or ON

Battery positive voltage

GAUGE

11 – Ground

Ignition switch ON

Battery positive voltage

FUEL OPN

13 – Ground

Constant

Battery positive voltage

D FR DOOR

15 – Ground

Constant

Battery positive voltage

PANEL

17 – Ground

Light control switch TAIL or HEAD

Battery positive voltage

HTR

19 – Ground

Ignition switch ON

Battery positive voltage

SRS–B

21 – Ground

Constant

Battery positive voltage

P/SEAT (D)

23 – Ground

Constant

Battery positive voltage

RAD NO.2

25 – Ground

Ignition switch ACC or ON

Battery positive voltage

WIP

27 – Ground

Ignition switch ON

Battery positive voltage

OBD

29 – Ground

Constant

Battery positive voltage

STOP

31 – Ground

Constant

Battery positive voltage

CIG

33 – Ground

Ignition switch ACC or ON

Battery positive voltage

ECU–IG

35 – Ground

Ignition switch ON

Battery positive voltage

ST

37 – Ground

Ignition switch ON

Battery positive voltage

IGN

39 – Ground

Ignition switch ON

Battery positive voltage

D RR DOOR

41 – Ground

Constant

Battery positive voltage

If the circuit is not as specified, inspect the circuits connected
to other parts.

(b)

Remove the relay from the junction block and inspect the
connector on junction block side.

Relay

Tester connection

Condition

Specified condition

Fog light

43 – Ground

Constant

Battery positive voltage

Fog light

44 – Ground

Constant

Continuity

Fog light

46 – Ground

Light control switch HEAD

Battery positive voltage

Taillight

47 – Ground

Constant

Battery positive voltage

Taillight

48 – Ground

Constant

Continuity

Taillight

50 – Ground

Constant

Continuity

If the circuit is not as specified, inspect the circuits connected
to other parts.