My low beam headlights suddenly stopped working. High beams only work if I hold the lever forward and force them on. My fog/driving lights below the bumper do not work. All other indicator lights work. The driver bulb appears burned and may be bad or near failure the passenger bulb looks normal. No "bulb failure" warning lights on the dash. The yellow wire plastic/casing leading to the driver's side low beam socket appears to be disintegrating exposing clean copper wire but there is no evident of arcing.The dashboard switch seems to work at least for turning on and off the indicator lights.

I will replace the bulbs but suspect this is not the root cause. Is there a relay or control module that likely needs replaced somewhere? And, is the section of wiring that connects to the base of the bulb replaceable?

Thanks once again for your help.

Steve

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Steven 04 C70 HPT, 06 S40 2.4i