Hi David,
Thanks again for all this!
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If your TAS300 behaves like the BRZ FT nav, your HU will need to see the camera video signal already present when the HU boots. That means your camera will need a source of 12V that turns on when you turn your key to ACC or ON/RUN. This is "+12V Accessory". That is used to turn the radio on/off. It's often used for accessory outlets ("cigarette lighter" outlets). There are usually several circuits (buses) going to various modules and devices throughout the car. You'll need to check your model's wiring diagrams to find good locations to tap (ideally near the camera).
On the other hand, if the TAS300 doesn't care about the camera video signal until you actually shift into reverse, then you can power your camera from the reverse lights (tap into that wire, near the camera).
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Hopefully this will be the case, otherwise I may have to bother you again for help on finding one of these 12V buses near the boot
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Thanks. That confirms you have the reverse signal at the 28-pin plug at the HU. That means we won't have to add that signal to your harness.
That doesn't tell us whether the reverse signal is on the native 28-pin harness or if it's merged in via the nav adapter harnesses. The main reason to check that is so we'll know for people who have your same model car but don't have the nav upgrade like yours.
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No problem, again I'll try and get you these this weekend. And FYI, I don't actually have the NAV upgrade on mine, but from my understanding of the installation manual I posted (
Link) the top 16 and 28 pin ports shouldn't be affected by the NAV module at all, however, I do know that the NAV versions have a slightly different software to those without NAV, would this make a difference? I'll see if someone with NAV could also have a look at the 28 pin harness for you as well.
And just one more thing, any ideas if I would need an NTSC camera or a PAL camera, or does it not make a difference?
Thanks,
Keith