Question about Lexus LS 430

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I have a 2004 lexus ls430 with a mark levinson radio and navigation. IThe radio will just go out and also my temperature display just above the screen.will go out as well. It also seems like i lost bass in rear speakers all together.maybe at the same time.Also none of the heat or radio controls will work till the display comes back on.

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Hi,, Yes all the problems are linked, They are all controlled by the same power supply, or the ACC (accessory) supply unit. This is just a fancy way of saying a fuse and a relay. Now there are 2 fuses , 1 in the kick panel under the dash by the drivers side, and the second is in the fuse box under the hood. the relay is in the fuse box under the hood. from what your describing, seems like of of them has run slack and shorting out.

  1. locate kickpanel
  2. remove cover , under the cover is a diagram showing the fuses, locate the acc fuse or accessory fuse.
  3. pull it, make sure its good, replace it.
  4. close ip panel and pop hood
  5. locate the fuse box
  6. locate the acc fuse or accessory fuse using the diagram on the cover
  7. pull it make sure its good replace it
  8. locate and pull the accessory relay
  9. pull it, and replace it.
thats it for now,, that should solve your problem however its not the only possible cause just simply the most likely, remember i aint on the spot so you are my eyes and ears, if this doesn't work respond and we'll try another approach.. which we'll call my second best guess.

Posted on Apr 06, 2011

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