I just noticed that none of the rear speakers in my 95 SC400 with the Nakamachi system (with CD) do not work...none, not the woofer or either side. When I fade to the rear, all the sound just goes away. I have checked the easy fuses (radio 1 and radio 2). Could there be an additional circuit breaker or fuse specifically for the rear amplifier? If not a fuse or CB, what else should I be suspecting?

 

Did the car get soaked, washed, rained where your at?

When I first got my car and washed it a few times I noticed when I opened the trunk water would run down and get all up in the hatch causing the stock amp not to work. The Amp would get wet and not work. I had to pull the amp out and blow it with compressed air to dry it out.

Now after a wash I would open the trunk SLOWLY so the water can run down the sides instead of inside the trunk. Something to look at it

 

Blown speakers, especially if they are stock. Follow the steps in post 2, if this is your case?
http://us.lexusownersclub.com/forums...1&#entry431033

 

I had a similar problem, but it was just the stock midranges in the rear blown. Woofer was an amp problem.

Boston Acoustic S45 speakers were drop-in replacements.