Is it possible to acquire another trunk unit and plug it in to reenable nav radio again?

 

https://www.ebay.com/itm/OEM-98-1998-99-1999-00-2000-Lexus-LS400-Navigation-GPS-Player-86841-50040/312253550250?epid=1317860989&hash=item48b3c30eaa:g:s0QAAOSw38VbsxZi


Like can I get this and plug it in.

 

you sure it's the trunk player? what if it's the headunit itself?
so you are unable to control the HVAC (heater, ac) as well?

 

I can control the HVAC from the buttons

 

Interestingly enough, I'm looking at that exact same unit. The one in my car was removed years ago by a previous owner and I never got around to replacing it.

To touch on the question of just plugging it in; yes, it's a simple install. However, If I'm not mistaken, the nav unit has an internal hard drive that is required for the nav to actually function. I would contact the vendor and find out if a hard drive is included.

 

I'm not concerned about the nav portion just the radio. My prior one didn't have functioning nav either.

 

So does your radio not function? My touch screen display and radio functions like normal, I just can't update the dash clock or obviously use the nav features. When I try and set the clock to the right region, I get an error message on the display that reads "Check Nav HDD"

 

Before water friend the trunk unit that's exactly what it did. Everything but nav worked. Now it's just off since either removed the trunk unit.


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I would look at the dash LCD unit as being the culprit or start looking at fuses and connections. The nav unit in the trunk 'shouldn't' have any effect on the head unit or the LCD display. It's possible that the nav unit may have tripped something when it fried, but unlikely.
When I first bought my car again back in 2006 (long story), the nav unit had been removed, but it wasn't until I tried to change the time that I realized it was gone. Everything works as advertised with the exception of nav.

 

Fuses good but the way I read it the screen is merely a monitor and the trunk unit is a pc. That's how I see it

 

I'm looking at the troubleshooting tree in the factory service manual (FSM) and that doesn't appear to be the case. The screen monitor/stereo is it's own unit, however it still relies on the amplifier under the seat as a power reference. (It looks like if one isn't powered, neither will the other one be) Which fuses have you checked? According to the FSM there are 3 fuses for the dash unit, Radio1, Radio2 and Dome. For the amp, there is one fuse marked AMP. I'm still trying to find the breakdown in the amp and wiring schematics, but I don't have the actual chassis electrical system book, so I've been looking online.
What I have found out though is that if there is a B+ (power) or ground short detected in the AVC-LAN then the system won't power up.

I would double check all the fuses with a meter and then start reading connections. Verify you are grounded at all the appropriate spots and have power where you need to have power.

 

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I'll have those checked, unit arrives this week. Hopefully it's just it

 

I plugged in the replacement, everything works again. Even nav for some reason