Lights flicker in off position

2001 CHEVROLET IMPALA
179,000 MILES • 6 CYL • 2WD • AUTOMATIC
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DAVISBOI88
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Headlights in off position but lights keep flickering. What do you think it could be
Sep 22, 2019 at 1:42 PM
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94 TRANSAM
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Hi Davis, Welcome to 2CarPros.

What you describe is likely the DRL (Day time running lights) failing. There is a DRL module under the dash that is basically just a diode. As it ages the voltage drops to the head lights and they flicker. A simple diode test will tell you if it is bad.

Below is a diagram of the circuit.

Rich
Sep 22, 2019 at 10:44 PM