Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1999-2000 Lexus LS400 . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a digital multimeter before making any connections. More information on using a multimeter and testing wires please see our Technical Support Area.
PART
COLOR
LOCATION
12 VOLT
CONSTANT
BLACK/WHITE (+) or WHITE/BLUE (+)
@ IGNITION SWITCH HARNESS
STARTER
BLACK/RED (+)
@ IGNITION SWITCH HARNESS
STARTER
2
N/A
IGNITION
1
WHITE (+)
@ IGNITION SWITCH HARNESS
IGNITION
2
BLACK (+)
@ IGNITION SWITCH HARNESS
IGNITION
3
N/A
ACCESSORY/HEATER
BLOWER 1
WHITE/GREEN (+)
@ IGNITION SWITCH HARNESS
ACCESSORY/HEATER
BLOWER 2
N/A
KEYSENSE
N/A
PARKING
LIGHTS ( - )
GREEN (-)
@ STEERING COLUMN HARNESS, 18-Pin Plug
PARKING
LIGHTS ( + )
GREEN/ORANGE (+)
@ FUSE BOX, 18-Pin Plug
POWER LOCK
See NOTE #1
See DIAGRAM
POWER UNLOCK
See NOTE #1
See DIAGRAM
DOOR TRIGGER
GREEN/WHITE (-)
IN DRIVERS KICK PANEL
DOMELIGHT
SUPERVISION
USE DOOR TRIGGER
TRUNK RELEASE
ORANGE (-)
@ TRUNK RELEASE SWITCH
SLIDING
POWER DOOR
N/A
HORN
GREEN/RED (-)
@ STEERING COLUMN HARNESS, 6-Pin PLug
TACH
BLACK/YELLOW
@ ECM, 28-Pin Plug, See NOTE *2
WAIT TO
START LIGHT
N/A
BRAKE
GREEN/WHITE (+)
IN DRIVERS KICK PANEL
FACTORY
ALARM DISARM
N/A
ANTI-THEFT
TRANSPONDER ANTI-THEFT SYSTEM, REQUIRES 791 BYPASS MODULE AND EXTRA IGNITION KEY
TRANSPONDER @ IGNITION SWITCH TUMBLER
EXTRA
INFORMATION
NOTE #1: THIS VEHICLE'S DOORLOCKS ARE SPECIAL AND WILL REQUIRE AN EXTRA RELAY, PART #775 AND 2 DIODES, TO CONNECT, See DIAGRAM
NOTE #2: THE ECM (ELECTRONIC CONTROL MODULE) IS LOCATED BEHIND GLOVEBOX.