TSRM/MK4 Supra/Wiring Diagrams
Repair ManualWiring Diagrams
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PS/Power Source, page 13

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Power Source — MK4 Supra Power Source wiring diagram, page 13
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Page text (OCR transcript)
POWER SOURCE

SERVICE HINTS

HEADLIGHT RELAY (FOR USA)
2–1 : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION OR DIMMER SW AT FLASH POSITION

HEADLIGHT RELAY (FOR CANADA)
2–1 : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION OR DIMMER SW AT FLASH POSITION
: CLOSED WITH ENGINE RUNNING AND PARKING BRAKE LEVER RELEASED (PARKING BRAKE SW OFF)

TAILLIGHT RELAY
5–3: CLOSED WITH LIGHT CONTROL SW AT TAIL OR HEAD POSITION

I19 IGNITION SW
7–5 : CLOSED WITH IGNITION KEY AT ACC OR ON POSITION
7–4 : CLOSED WITH IGNITION KEY AT ON OR ST POSITION
2–3 : CLOSED WITH IGNITION KEY AT ON OR ST POSITION
7–8 : CLOSED WITH IGNITION KEY AT ST POSITION

: PARTS LOCATION

CODE    SEE PAGE    CODE    SEE PAGE    CODE    SEE PAGE
I19    29

: RELAY BLOCKS

CODE    SEE PAGE    RELAY BLOCKS (RELAY BLOCK LOCATION)
2    22    R/B NO. 2 (ENGINE COMPARTMENT LEFT )
4    23    R/B NO. 4 (LEFT KICK PANEL)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE    SEE PAGE    JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1B    20    ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1C    20    FLOOR NO. 2 WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1H
1J    20    COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
1K
2A    22    BATTERY AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2B    22    ENGINE ROOM MAIN WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

CODE    SEE PAGE    JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IB1    36    ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IC2    36    FLOOR NO. 2 WIRE AND COWL WIRE (LEFT KICK PANEL)

: SPLICE POINTS

CODE    SEE PAGE    WIRE HARNESS WITH SPLICE POINTS    CODE    SEE PAGE    WIRE HARNESS WITH SPLICE POINTS
E 7    32    ENGINE ROOM MAIN WIRE    E 8    32    ENGINE ROOM MAIN WIRE

I19

[Connector diagram showing 8-pin connector with pins numbered 1-8 in two rows]

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