An overhead door immobilizer deactivates power to the power head operator
in a conventional overhead door system to prevent the door from damaging
the hatch portion of a vehicle when the hatch portion is in an open
position or orientation. A hatch position transmitter (HPT) module
mounted on the hatch portion transmits a coded RF signal. A power
receiver module (PRM) receives and decodes the HPT RF signal and operates
to deactivate power when the hatch position is in an open position and
activate power when the hatch position is in a closed position.