Standard Ignition TCA100 4WD Actuator
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Standard Ignition

Standard Ignition TCA100 4WD Actuator

Brand Standard Ignition TCA100
Connector Gender Female
Connector Shape Square
Terminal Gender Male
Terminal Type Blade
Fits Lexus and Toyota · 7 vehicles

4WD actuator. Controls engagement of the four-wheel-drive system.

Square connector. Single female connector with five blade terminals.

Cross-references Dorman - OE Solutions 600-442, Standard Ignition TCA100 and 4145060042 for the same application. See all 6.

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4WD Actuator for Toyota and Lexus Applications

Standard Ignition TCA100 is a 4WD actuator built with a female square connector, five male blade terminals, and a single connector interface for direct electrical integration. It is listed for 1993-1997 Toyota Land Cruiser and 1996-1997 Lexus LX450 applications, with fitment notes tied to the rear window defogger module connector, rear HVAC floor mode door actuator harness, and power seat switch.

  • 4WD actuator with female connector design
  • Square connector shape for matched harness connection
  • 5 male blade terminals for the specified electrical interface
  • Direct fitment coverage for Toyota Land Cruiser and Lexus LX450
  • Standard Ignition TCA100 replacement part number

Detailed Product Information

Standard Ignition TCA100 is an OE-style driveline and axle electrical component for vehicles that use this connector and terminal configuration. The female, square connector layout and five blade-style male terminals support the specified actuator harness connection used in the listed Toyota Land Cruiser and Lexus LX450 applications. This part cross-references Dorman OE Solutions 600-442 for the same application. If you are sourcing a Standard Ignition TCA100 for a 1993-1997 Toyota Land Cruiser or a 1996-1997 Lexus LX450, verify the connector shape and terminal count against the original unit before installation.

Common Issues This Part Can Address

  • Loss of electrical connection at the actuator interface
  • Damaged connector housing on the original unit
  • Corroded or worn blade terminals
  • Intermittent operation in the rear HVAC floor mode door actuator circuit
  • Connector mismatch during replacement of the rear window defogger module harness connection

Installation Notes and Tips

Confirm the original connector is female, square, and uses five male blade terminals before ordering. Compare the existing harness and actuator plug on your Toyota Land Cruiser or Lexus LX450 to the part photos and terminal layout to ensure the electrical interface matches. Clean any corrosion from the mating connector and inspect the harness for heat damage or broken terminals before connecting the replacement.

Quality Assurance

Standard Ignition manufactures electrical replacement parts for automotive service applications, and TCA100 is cataloged to the specified vehicle fitment and connector configuration. Use the listed year, make, model, and notes to confirm application accuracy before installation.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypePositionNotes
1997LexusLX4504WDN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1997ToyotaLand Cruiser4WDN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1996LexusLX4504WDN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1996ToyotaLand Cruiser4WDN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1995ToyotaLand Cruiser4WDN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1994ToyotaLand Cruiser4WDN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
1993ToyotaLand Cruiser4WDN/ARear window defogger module connector compatible with rear HVAC floor mode door actuator harness and power seat switch.
Directly replaces or cross-references 6 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Dorman - OE Solutions — 600-442Standard Ignition — TCA1004145060042FWA500FWD90SAT001