Yeah I think we missed out. Power loom plug is on the tailgate under the trim but only has a two wire plug on the down side powering the high level stop lamp. The upstream side of the plug is fully wired so I would assume it is carrying the required power for the outer lamps. The outer lamps are dummy and have no illumination in them on the Australian models so would need complete replacement. Around AU$127 each for the lamps on AliExpress but I'd need to source the harness from a US dealer and they're around US$150 plus shipping. To buy the whole thing (lamps and harness) from a US dealer or parts source would be around AU$900 shipped but they'd be genuine parts. Not worth looking at currently plus the lamp assembly and the garnish are bolted together and the garnish is held on by clips which refuse to budge and it's too close to glass for me to start forcing stuff. I'll have to live without it...
I did my checks today and its as you describe... only 2 wires are send to the brake light ...however the other side of harness has full 5 wires, 2 grounds (1 for brake light n other black for park end lights...
I went further to test if theres power for park light at harness and there is ...so no need for fuse as the system fully works.
The existing tail light wire harness can can accommodate the additional wire and use the correct pin size and push into connector... (so as to get 5 wires on either side)....
As for the light unit it self, i bore a small hole into the dummy/block area n shine a light through and the unit lit up ....however a bit concern about the light coverage area as it barely reach to the other end....... hence I need to see pic of the bulb or part# ... although enough light wasn't projected into small hole... but concern tht it didn't spread wider, maybe brighter bulb would do better. However it do able ..... if h8 bulb don't light up properly then I guess I will open up n place some leds in side.
Other checks done also reveal that all feature add can be done by acquiring parts and install.
Future feature I plan on installing;
.HUD display.... just need unit n control button. ( dash area would need to be cut out)
FCM/ACC...distance radar and button needed.
Note: front mount location doesn't have connector... but wires are wrap up.
360° camera... front camera (have already), existing rear camera, side mirror with camera ( expense n very hard to find), steering wheel button (readily available) and camera control ecu (have already)
BSW ... 2 x rear radar, brackets and same side mirror used in 360°
LDW ... I am not sure about, need to do some research and verify that connector exist n if it can be use with existing windscreen.
Smart link radio ....I have parts ready to install... just waiting on double usb slot... along with an hdmi adapter.... I am just sorry that theres no software to watch video on these unit ... I need a work around solution.
Power tailgate... need to purchase and install