Abstract: The disclosure is generally directed to a vehicle trailer light assembly monitoring system. An example system includes a metal-oxide-semiconductor field effect transistor (MOSFET) connected in series with a light assembly of the vehicle trailer. A voltage driver is configurable by the controller to selectively couple into a gate terminal of the MOSFET one of a first voltage that places the MOSFET in a resistor mode of operation, a second voltage that places the MOSFET in a switched-on mode of operation, or a third voltage that places the MOSFET in a switched-off mode of operation. In an example implementation, the controller determines a presence or an absence of the vehicle trailer and/or of the light assembly, based on evaluating a voltage drop across the light assembly that is detected by the voltage level detector when the MOSFET is placed in the resistor mode of operation.

Abstract: A trailer electrical connector system for a motor vehicle includes a housing configured to be connected to the motor vehicle, a plurality of electrical connectors each configured to connect to a plug-in trailer connector to provide electrical power to a trailer, and a normally closed switch electrically coupled to a pair of the electrical connectors, wherein the normally closed switch is in a closed state when the plug-in trailer connector is not connected to the plurality of electrical connectors and moves to an open state when the plug-in electrical connector is connected to the electrical connectors. The system also includes a controller sensing an electrical signal across the pair of electrical connectors through the normally closed switch and detecting a state of the electrical connection of the trailer to the vehicle based on the detected state.

Abstract: The systems and methods disclosed herein are configured to determine if a trailer is connected to a vehicle. The methods may include determining a connection during an off-state and an on-state of the vehicle. The determinations may be compared to determine whether to enable use of the off-state determination with respect to features of the vehicle.

Abstract: An electrical resistance of a lamp in communication with a computer is determined. A respective classification for each of the electrical resistance, a vehicle length, and a trailer length is determined. Each classification is associated to a respective range of values of one of the electrical resistance, the vehicle length, or the trailer length. Based on the classifications a trailer that is attached to a vehicle is detected. One or more components of the vehicle are actuated to move the trailer.

Abstract: The systems and methods disclosed herein are configured to determine if a trailer is connected to a vehicle. The methods may include determining a connection during an off-state and an on-state of the vehicle. The determinations may be compared to determine whether to enable use of the off-state determination with respect to features of the vehicle.

Abstract: An electrical resistance of a lamp in communication with a computer is determined. A respective classification for each of the electrical resistance, a vehicle length, and a trailer length is determined. Each classification is associated to a respective range of values of one of the electrical resistance, the vehicle length, or the trailer length. Based on the classifications a trailer that is attached to a vehicle is detected. One or more components of the vehicle are actuated to move the trailer.