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: Dual-tone horn assemblies and methods of use are disclosed herein. An example dual scroll assembly includes a nozzle having a first portion of the nozzle has a first diameter and a second portion of the nozzle has a second diameter that has a size that is different from the first diameter, a first spiraled channel that receives air from the first portion of the nozzle. The air traveling through the first spiraled channel produces a first tone at a first frequency. A divider plate is disposed between the first spiraled channel and a second spiraled channel. The second spiraled channel receives the air from the second portion of the nozzle. The air traveling through the second spiraled channel produces a second tone at a second frequency. The first tone and the second tone when produced simultaneously create a dyad.

Abstract: A trailer test module of a vehicle is electrically connected between a trailer tow electrical connector of the vehicle and a wiring harness of the vehicle that carries electrical signals for a trailer such that when the electrical connector of the trailer is attached to the trailer tow electrical connector, the trailer tow electrical connector is between the trailer test module and the electrical connector of the trailer. The trailer test module includes circuitry that replicates an electrical load of the trailer.

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: An electrified vehicle backup battery system includes a traction battery pack of an electrified vehicle, and a backup battery assembly that is removably mounted to the electrified vehicle. The backup battery assembly is configured to recharge the traction battery pack through a charge port of the electrified vehicle. A traction battery pack charging method includes recharging a traction battery pack of an electrified vehicle from a backup battery assembly that is mounted above a roof of the electrified vehicle.

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: Dual-tone horn assemblies and methods of use are disclosed herein. An example dual scroll assembly includes a nozzle having a first portion of the nozzle has a first diameter and a second portion of the nozzle has a second diameter that has a size that is different from the first diameter, a first spiraled channel that receives air from the first portion of the nozzle. The air traveling through the first spiraled channel produces a first tone at a first frequency. A divider plate is disposed between the first spiraled channel and a second spiraled channel. The second spiraled channel receives the air from the second portion of the nozzle. The air traveling through the second spiraled channel produces a second tone at a second frequency. The first tone and the second tone when produced simultaneously create a dyad.

Abstract: A coupler assembly for a trailer hitch includes: a pin extender comprising electrical pins and first slots; a pin receiver comprising pin slots and second and third slots; a housing comprising fourth slots; first stabilizers disposed in the first and second slots; second stabilizers disposed in the third and fourth slots. Each stabilizer includes a spring and a solid head, and the electrical pins are disposed in the pin slots.

Abstract: A coupler assembly for a trailer hitch includes: a pin extender comprising electrical pins and first slots; a pin receiver comprising pin slots and second and third slots; a housing comprising fourth slots; first stabilizers disposed in the first and second slots; second stabilizers disposed in the third and fourth slots. Each stabilizer includes a spring and a solid head, and the electrical pins are disposed in the pin slots.

Abstract: A vehicle includes a magnetic switch and a controller. The magnetic switch is coupled with a trailer connection receptacle housing and aligned with a magnet in a cap of the housing while closed. The controller is configured to, in response to detecting an open position of the cap based on a state of the magnetic switch, periodically supply a voltage pulse less than an operating voltage across contacts of the housing to detect continuity therebetween. The controller is further configured to, in response to detecting a closed position of the cap, inhibit the voltage pulse. The magnetic switch may be a reed switch.