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Wheelchair Lift Safety Interlock

InPower’s Models ITM-T20NPB\ITM-T20NPB-ADL interlock systems provide the required FMVSS 403/404 interlock functions for public-use platform lifts installed in Ford Transit chassis. The system consists of a combined driver’s display and control module as well as an easy to install plug and play chassis wiring harness.

Ford Transit Platform Lift Interlock ( ITM-T20NPB and ITM-T20NPB-ADL )

Key Features:

  • Supports +2020 Ford Transit chassis
  • Combined driver’s display and control module
  • Can be used for side or rear door lift installations
  • Does not use the ABS controlled park brake
  • Monitors up to four door switches plus lift door
  • Plug-and-Play wiring harness


  • Power and ground to the ITM-T20NPB & ITM-T20NPB-ADL the Shifter T-Harness (Pin 11)
  • Rear lift door switch to (blunt-cut violet) ground when door is closed
  • Side lift door switch (blunt-cut tan) ground when door is open/ajar
  • Three separate door wires (blue wires) supplied for either flash only, or shift lock (ADL only)
  • Lift enable +12 volts @ 1.8 amps maximum, use relay for additional power requirements
  • Size: 3.5″W X 1.5″ H X .56″ D
  • System Total Power: 2 amps @ 13.6V
  • Operational Temperature: -40C to +85C

System Diagrams:

Mechanical Drawings:

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