1998 Lexus GS400 Car Alarm Wiring Diagram

Whether your an expert installer or a novice enthusiast with a 1998 Lexus GS400, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car alarm, remote car starter, car security system or any mobile electronics is identifying the correct wires for a 1998 Lexus GS400.

The Modified Life staff has put their heads together to create an invaluable resource containing car alarm wiring diagram, remote car starter wiring diagram, car wiring diagram and car security wiring diagram. Feel free to use any car alarm wiring diagram or remote car starter wiring diagram that is listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind and most diagrams listed on our site are submitted by our Modified Life community. Use of the wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 1998 Lexus GS400.

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1998 Lexus GS400 Car Alarm Wiring Diagram Information

Constant 12V+ Wire: White/Blue
Constant 12V+ Wire Location: Ignition Switch Large Harness

Starter Wire (+): Black
Starter Wire Location: Ignition Switch Harness

Second Starter Wire (+): N/A
Start Wire Location: N/A

Ignition Wire (+): Black/Yellow
Ignition Wire Location: Ignition Switch Harness

Second Ignition Wire: Black/White
Second Ignition Wire Location: Ignition Switch Harness

Accessory Wire: Blue/Yellow
Accessory Wire Location: Ignition Switch Harness

Second Accessory Wire: N/A
Accessory Wire Location: N/A

Key Sense Wire (+): N/A
Key Sense Location: N/A

Tachometer Wire: Black/Yellow
Tachometer Wire Location: 28 pin plug, pin #16. Located inside ECU box which is under hood on the drivers side.

Door Lock Wire (-): Light Green/Black
Door Lock Wire Location: In drivers door only multiplex locks.

Door Unlock Wire (-): Light Green/Red & Gray
Door Unlock Wire Location: Use both wires (2 pulse unlock).

Door Trigger Wire (-): Green
Door Trigger Wire Location: To beat the dome light delay, go to each door module located in each door. The wires are : red/white for drivers door, red/green for front right door, red/white for left rear door, and red/yellow for right rear door. Dome light supervision wire is located in a 25 pin plug pin #13 behind the fuse panel in the passenger kick at the body ECU.

Dome Supervision Wire: Green
Dome Supervision Wire Location: To beat the dome light delay, go to each door module located in each door. The wires are : red/white for drivers door, red/green for front right door, red/white for left rear door, and red/yellow for right rear door. Dome light supervision wire is located in a 25 pin plug pin #13 behind the fuse panel in the passenger kick at the body ECU.

Headlights Wire (-): Red/Black
Headlights Wire Location: Under Steering Column

Parking Light Positive Wire (+): Green
Parking Light Positive Wire Location: Bottom right of fuse panel.

Parking Light Negative Wire (-): Red/Yellow
Parking Light Negative Wire Location: Under Steering Column

Trunk/Hatch Pin Wire (-): Red/White
Trunk/Hatch Pin Wire Location: Drivers kick panel in 20 pin plug.

Hood Pin Wire (-): Violet/Green
Hood Pin Wire Location: Passenger kick panel in 25 pin plug.

Trunk/Hatch Release Wire (+): Violet/Yellow or Blue
Trunk/Hatch Release Wire Location: Violet/yellow(-) is at the switch or the blue(+) at the drivers kick in a 18 pin plug.

Factory Alarm Arm Wire: Arms with Lock.
Factory Alarm Arm Wire Location: N/A

Factory Alarm Disarm Wire (-): Disarms with Unlock.
Factory Alarm Disarm Wire Location: N/A

Factory Alarm Disarm but No Unlock Wire (-): Light Green/Black
Factory Alarm Disarm Wire Location: Drivers kick in 18 pin plug.

Horn Trigger Wire (-): Green/Black
Horn Trigger Wire Location: Steering Column. Horn is a green/black in a blue 13 pin plug in the drivers kick.

Brake Wire (+): Green/White
Brake Wire Location: Drivers kick panel in 20 pin plug.

Emergency Parking Brake Wire (-): N/A
Emergency Parking Brake Wire Location: N/A

Make Your Car Alarm Installation Easy with these Tools and Accessories

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