Richard, happy to help! This is the place I purchased the monitor from:
https://www.rearviewsafety.com/safet...-monitors.html
Model # RVS-6139Q 9” quad view stand alone monitor $224.99, they also have a 7” but it is the same price so I used the 9”. The monitor has 4 camera inputs and doesn’t require the video switch box, all three cameras plug into the supplied harness. Not wanting to drill hole in the dash I purchased a Ram suction mount and adhesive disc to stick on the dash. Test fit for placement, clean the area with alcohol, and allow the disc to sit for 24 hours before attaching the suction mount.
Follow the video input wire from the back of your radio and it will lead you to the switch box, the wire isn’t very long so the box can’t be to far away.
These are pictures of the box you are looking for, wire colors on the factory harness, and my monitor mounted on the dash. If you have more questions I will be glad to assist as best I can.
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