I installed an aftermarket head unit after my Nak head unit went bad. I'm getting power but no audio. Can someone help. Also does the nak amp power all of the speakers or just the sub and where is the amp located. Thanks

 

Haven't done an LS. I do know the "premium" radio in the Camry has an amp behind the glove box that powers the speakers independent from the head unit. I had to use a different kind of hook up from an aftermarket radio that let me plug into the line-level RCA out plugs on the back of the radio and click that into the harness that goes to the premium amp. Trying to connect directly from the amplified outputs does not work unless you chop up a bunch of wires and try to bypass the amp entirely.

 

amp is under the pass side seat. it powers all speakers and sub so it will need input from the HU properly.
see thread below:
https://www.clublexus.com/forums/ls-...er-thread.html

 

I thought the Nakamichi amp in the 1994 LS was in the trunk on the right side. The separate amp for the Nak in the 1994 powers all the speakers. The amp for the Pioneer powers only the woofer.

Attached is the wiring diagram for the 1994 LS400 Nakamichi system.