Scott07ES

Please help! I have a 2007 es350 with nav. I want ti install an aftermarket stereo using the amp turn on harness, model tyto-01. I followed the instructions, pretty simple, but now there is no function of the navigation and no recognition of it, also only the front speakers have sound. Does anyone have a solution or ideas on how to make this work.

Clutchless

Welcome to Club Lexus. I don't know the answer, but the search feature is a great simple to use tool you should try first:
You may want to try searching this forum and also the electronics/stereo forum as this has probably been asked before
https://www.clublexus.com/forums/lex...lectronics-12/