Hi David,
Apologies for the late response here. I managed to get round to checking out the native 28-pin harness however, I was unable to unplug the connector as the foam surround has actually been stuck to the connectors, there's no way of removing the foam without actually destroying the foam. Below are some pics of what I could get, again apologies for not being able to capture them in the ideal positions as they are very tightly clustered together which doesn't allow for much movement or the ability to insert anything between the rows at the back of the 28-pin, hopefully these will suffice.
Also, sadly I don't have anything portable that can output a video signal to the yellow RC cable to test your harness out so I may have to wait for the camera to actually arrive to test it. I've had a quick read through your e-mail that you've sent and that's quite a list of tests to run
I'll have to try and find myself a voltmeter, maybe I can find a relatively cheap one off ebay, but I'll be sure to run these tests for you before installing the camera. I'll come up with a simplified game plan that I'll run through with you first as there are a couple of things that I'm not too sure on so I'll be in touch shortly.
Thanks again for all your help.
Kind Regards,
Keith