Sorry for the delay in getting responses back. This has become a weekend spare time project. Just the backup harness would probably be between $8 and $10. The video harness would be about $15. I will have more firm costs when I get everything put together and tally all of the totals. Right now I am more concerned with finishing a set of test harnesses to confirm that they work before I start making some to sell to others. So far I have made all of the wire pieces and have completed a backup camera harness to test (possibly doing that tomorrow). I am waiting on the video input plastic connector so I can assemble the test harness and confirm that it works as well. Feel free to PM me with questions.

 

SUCCESS! The backup camera harness AND the video input harness went off without a hitch. I know have a supplier for the pins and can order the connectors straight from Toyota.
Takes me about a week to put both together (doing it in my spare time) once I get all of the parts. PM me if interested!

 

I know this is an OOOOOLD thread but I am very interested in buying the video in/camera cables,
I don't suppose by an miracle, you still make them genmoore? Or anyone else?

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Nice DIY!