Rear camera system for a vehicle with a trailer

1. An apparatus, comprising:

a vehicle plug; and

a video control circuit configured to receive a first video signal from a first camera and a second video signal from a second camera, wherein the video control circuit is configured to provide the first video signal or the second video signal in response to a control signal, wherein the control signal is indicative of whether a trailer plug is connected to the vehicle plug, wherein the video control circuit comprises a sense circuit configured to generate the control signal, the sense circuit being configured to determine the trailer plug is connected by monitoring power provided to or by the second camera; and

wherein the vehicle plug is attached to the rear of a vehicle for transmitting power and signals between the vehicle and a trailer, the vehicle plug comprising:

a first end configured to connect to the trailer plug, comprising a power conductor;

one or more video signal conductors configured to receive the second video signal; and

a second end configured to connect to the vehicle, comprising a first conductor configured to transmit the second video signal to the video control circuit disposed in the vehicle, wherein the video control circuit is configured to determine that the vehicle is in reverse and the trailer plug is coupled to the first end, wherein the second video signal is provided to a display when the vehicle is in reverse and the trailer plug is coupled to the first end.

2. The apparatus of claim 1 , wherein the vehicle plug further comprises an adapter configured to utilize a plug with a video conductor.

3. The apparatus of claim 2 , wherein the adapter is configured to connect the vehicle plug with the trailer plug.

4. The apparatus of claim 1 , wherein the vehicle plug further comprises a light conductor, a brake signal conductor, a ground conductor, a right turn conductor, a left turn conductor and an auxiliary conductor.

5. The apparatus of claim 1 , wherein the one or more video signal conductors is configured to allow an image captured by the second camera disposed on the trailer to be transmitted to the vehicle.

6. The apparatus of claim 1 , wherein the vehicle plug further comprises a video enable signal (VES) circuit configured to detect connection between the vehicle plug and the trailer plug.

7. The apparatus of claim 6 , wherein the VES circuit is configured to detect a video signal from the second camera.

8. A system comprising:

a trailer plug;

a video control module for a vehicle, the vehicle being capable of use with a trailer, the vehicle having a backup camera and a display and the trailer having a trailer camera, the video control module comprising a first input for receiving a first video signal from the backup camera, a second input for receiving a second video signal from the trailer camera, and a control input for receiving a video signal enable signal on a video signal enable conductor, and a control circuit for providing the second video signal to the display in response at least in part to the video signal enable signal, wherein the video signal enable signal is provided by a sense circuit configured to sense power usage by the trailer camera through the trailer plug; and

wherein the trailer plug is attached to a trailer for transmitting power and signals between the vehicle and the trailer, the trailer plug comprising:

a power conductor configured to receive power from the vehicle, wherein the received power is used at least in part for the trailer camera; and

one or more video signal conductors configured to transmit the second video signal from the trailer to the vehicle.

9. The system of claim 8 , further comprising an adapter configured to utilize a plug with a video conductor.

10. The system of claim 9 , wherein the adapter is configured to connect the trailer plug with a vehicle plug.

11. The system of claim 8 , further comprising a light conductor, a brake signal conductor, a ground conductor, a right turn conductor, a left turn conductor and an auxiliary conductor.

12. The system of claim 10 , wherein the adapter is configured to connect the trailer plug with a vehicle plug.

13. A method of using a trailer camera with a vehicle comprising a reverse camera and a display and transmitting power and signals between the vehicle and a trailer, the method comprising:

creating an electrical connection between the vehicle and the trailer via a vehicle plug attached to a rear portion of the vehicle and a trailer plug attached to the trailer;

providing power to one or more electrical components of the trailer through the electrical connection, wherein the one or more electrical components comprise one or more video cameras, the one or video cameras comprising the trailer camera;

receiving at least one of a first video signal from the reverse camera and a second video signal from the trailer camera;

providing the first video signal to the display when the vehicle is in reverse and a sense signal is not present

determining whether the vehicle is in reverse;

and

providing the second video signal to the display when the vehicle is in reverse and the sense signal is present, wherein the sense signal is provided by a sense circuit configured to monitor power associated with the trailer camera through the trailer plug associated with the trailer camera via the electrical connection.

14. The method of claim 13 , wherein the electrical connection between the vehicle plug and the trailer plug is connected external to the vehicle.

15. The method of claim 14 , wherein creating the electrical connection comprises using an adapter configured to utilize at least one of the vehicle plug or the trailer plug with a video conductor.

16. The method of claim 14 , wherein the vehicle plug and the trailer plug comprise a plurality of conductors, the plurality of conductors comprising a power conductor, one or more video signal conductors, a light conductor, a brake signal conductor, a ground conductor, a right turn conductor, a left turn conductor and an auxiliary conductor.

17. The method of claim 16 , wherein the one or more video signal conductors configured to allow an image captured by the trailer camera disposed on the trailer to be transmitted to the vehicle.

18. The method of claim 13 , wherein determining whether the vehicle is reverse comprises determining whether a transmission of the vehicle is in reverse.

19. The method of claim 13 , further comprising detecting video signals from the one or more video cameras of the trailer.

20. The method of claim 13 , wherein the electrical connection between the vehicle and the trailer are configured to transmit a plurality of signals from the trailer to the vehicle, the plurality of signals comprising: turning signals, light signals, brake signals, video signals and audio signals.