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It may caused by a light installed that don't match the factory specifications, could be the wattage is a bit off or something of that nature. It could also be the lamp failure sensor. On the LS400 it is located in the trunk on the drivers-side just behind the backseat. The sensor activates the warning light when there is a break in the circuit for the brake lights or the tail-lights.

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โˆ™ 2006-05-01 08:30:47
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Q: What would cause the 'rear light failure warning' light to stay on in a 1996 Lexus ES300 even though no bulbs are burned out?
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