IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Weird Headlight Malfunction

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Old Mar 4, 2025 | 03:52 PM
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acortazzo
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Driver School Candidate
 
Joined: Sep 2019
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From: PA
Default Weird Headlight Malfunction

I have a headlight malfunction, looking for optimal solution.

Key info:
  1. Moisture in housing, dried out but keeps coming back.
  2. Doesn’t respond to switch in car. Will be on if I turn off, etc. High beam on causes low beam to flicker. Something with wiring/sensor clearly not ok.
  3. Day time running seem to be malfunctionin along with. Ex: Today light was on in malfunction unit but daytime light off, sometimes it’s opposite. Low beam on and daytime running either flickering or off.




What should I replace? The switch/daytime running/lowbeam/high beam malfunction has me confused.

Thanks in advance!
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