Nav door help please!

[A.O.]

Ok, I have a 2004, before I bought it the previous owner changed the Radio out for a nice Pioneer with all the goodies, back up cam, car play, Sirius ready, Bluetooth,  bla bla bla BUT, the nav door doesn't function. The nav unit is in there, I pushed the door up part way to see, it has a 2013 disc in the unit in the trunk, no Idea if it works and not sure I care. I have nave through my phone that works through the radio. I really want to get that door operational and to see what works and what doesn't. 
Seems all the buttons on the top of the climate control are dead, I did pull it out and all the plugs back there are plugged in, so that's ok I guess but it still doesn't seem to be getting power. I have a full set of Lexus shop manuals but I can't find any reference as to the nav door or power to those buttons!
Anyone have any idea on where to start?

[Frank DUva]

Have you checked the fuses? Did the previous owner install a back-up cam? Does the nav screen work? Maybe they removed the plug for the nav screen to install the Pioneer stereo unit. There seems to be a few possibilities.

[A.O.]

6 minutes ago, Frank DUva said:

Have you checked the fuses? Did the previous owner install a back-up cam? Does the nav screen work? Maybe they removed the plug for the nav screen to install the Pioneer stereo unit. There seems to be a few possibilities.

The only fuse I could find that had anything to do with it was listed as "Tv/navigation" and I think it was #29 in the passenger side kick panel and that 5amp fuse was fine. Yes there is a backup cam. I pulled the climate control out and all plugs were there and plugged in. No as far as I know the nav screen doesn't work, seems like all the buttons on top of the climate control are dead.
Is there another plug somewhere that I'm missing? Or a different fuse?

[Frank DUva]

Does the top "open/close" button have power?

[A.O.]

2 minutes ago, Frank DUva said:

Does the top "open/close" button have power?

Doesn't seem to, as far as I can tell none of those top buttons do anything/have power.

[Frank DUva]

You probably should check electrical connectors for power going into the unit, and continuity for the switches. Or, you could gamble and replace the unit, but they go for $300-$700 on e-bay.

[Frank DUva]

If you have the manuals, you can check the diagnosis chapter for the connectors pin locations, and purpose.

[A.O.]

I'm thinking the unit is probably fine, something was done putting the new radio in would be my guess.
And I have a full set of manuals, and they are more confusing than all the wiring behind the radio!!!!

[Frank DUva]

Yes, that's definitely a good possibility. I repaired my stereo cover and when I finished, my HVAC unit did not work, nor the top. No light, no nothing. I took the unit out again and to my relief, had found I didn't push two connectors in all the way.  I have no other suggestions, hope you sort it out.

[A.O.]

3 hours ago, Frank DUva said:

Yes, that's definitely a good possibility. I repaired my stereo cover and when I finished, my HVAC unit did not work, nor the top. No light, no nothing. I took the unit out again and to my relief, had found I didn't push two connectors in all the way.  I have no other suggestions, hope you sort it out.

Thanks..