I recently bought a 2003 S-Type. I runs, drives and rides excellent! After I bought the car (as-is, of course), I discovered an odd quirk;

The drivers side controls (mirrors and all four windows) work fine during the day however, when the headlights are turned on (any position other than off) the controls do not work.

Has anyone else ever heard of this problem and know how to repair it?

 

No it's a new one but please post back if you find the answer.
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