Lights flicker in off position

Tiny
DAVISBOI88
  • MEMBER
  • 2001 CHEVROLET IMPALA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 179,000 MILES
Headlights in off position but lights keep flickering. What do you think it could be
Sunday, September 22nd, 2019 AT 1:42 PM

1 Reply

Tiny
94 TRANSAM
  • MECHANIC
  • 680 POSTS
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
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Sunday, September 22nd, 2019 AT 10:44 PM

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