i was wondering if it is possible to install both unit together. i have both unit and am about to install the two but then i noticed that they both use the same harness to connect into the back of the navigation unit. my question is can i basically loop both of the harnesses together and then plug them into the back of the navigation. what order should the factory harness go into first? i dont want to mess up anything in the car. i tried looking around but no one said anything about how to install both at the same time.

yes they work together, i have heard several cases. which one goes first shouldn't matter

I have both units on my car - they work fine as rominl says... no worries....

thanks you guys. i will try it later tonight after work. its great to have forums like these when you need help.

+1 on having both nav override kit and vais working together so good luck. i don't recall that they both used the same connection tho but its been a while since i was back there.

I just installed the Vais iPod + video and also did the Nav override with switch, on my 07 GS350 and it all works great. The cables are not the same. The Vais cable connects to the radio and the cables clipped for the override are on the Nav display.

sorry i saw that they arent the same. i had installed the nav hack yesterday and just got the vaistech in the mail today at work so from remember what was back there i didnt see any other harness so i figured that they were the same. my bad you guys. i finally got both installed. yah!!! except now the vaistech ipod adapter doesnt work with my iphone. it would say this accessory is not compatible with the iphone on the screen of my phone... any help with this problem??

i was wondering with the navi hack were u able to watch videos while car is in motion with out the ebrake on...?

Since the Vaistech and the nav hack use the same harness, can just buy the vaistech unit and perform the wirehack on the vaistech harness?

i was wondering with the navi hack were u able to watch videos while car is in motion with out the ebrake on...?

i think they say DIFFERENT harnesses

Okay...sorry for injecting that extra layer of confusion in there.

Can anyone report which harnesses that that Vaistech interfaces with?

seems to be one of the harnesses for audio unit

the vais harness plugs into the audio plug (12 pin i think) that is located toward the lower right corner (passenger side) of the unit, oriented as if you were looking at it while in the dash.