Help with older backup camera

[flamingoroad]

I recently purchased a 2007 AS Classic Limited 34. The trailer has a wired back-up camera on the rear mounted near the running lights. The cable is a 4-conductor cable (no coax) in a black sheath that runs from through the trailer to the hitch, then under the TV to a point beneath the driver's side floor pan, where it penetrates the floor pan into the cab. I have the monitor that doesn't have any markings of any kind (make, model, etc) and the cable. The cable was embedded under the dash somewhere and probably connected to power. Does anyone know who may have made this camera/monitor system or where I might find information on it? Are there monitors that work with a 4-wire system that you can recommend?
Thanks

[joshjack]

It shouldn't be hard to adapt it to work with a different monitor. I'm sure it's video+, video-, GND, and DC12.

You might try opening the camera up to see which color does what.