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Heater / Blower Touch Sreen

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I have recently bought a 1998 LS400 / Celsior. It drives like a dream. The Sat Nav screen works OK but the Air Con / Heater screen has all the icons greyed out, and are inactive. Any advice would be greatly appreciated



I discovered a small electronic box ( after market ) attached to the computer unit in the boot. The little box was was marked as a TV tuner and was connected in series to the blue plug. The box was removed and all icons now working. Some previous owner had obviously wired this incorrectly.

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