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1993 Gs300 Audio Codes

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I have just bought my first Lexus. It's a 1993 GS300SE, it's a cracking car apart from the fact that I can't get the audio system to work. It displays SEC when the ignition is switched on. I have tried the last 3 digits of my VIN number, as suggested in threads elsewhere in the forums and a couple of other tries, but to no avail. I do not want to exceed the 9 tries limit and disable my system.

Have I missed something, any ideas?


Mark 8-)

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