2001 Taurus Headlight Problem

Locate the headlight ground wire, it is near the headlight bulb, it must be corroded or loose.

After 2000 the headlight wiring was changed on most models.
The new system grounded the lights thru the dimmer switch and headlight switch instead of the switches providing power as in years past.
So you have a red/blk for low beam and lite green/blk for high beam which goes to the dimmer and then to the headlight switch.
Dark blue/white is power from one fuse and dark green/orange is the other side power. One fuse for each side.

Here you go Duane , watch this video . shows everything you need ! How To Install Replace Headlight Ford Taurus 00 07 1AAuto com

Have your headlight and dash dimmer switches checked. One or both may need replacement.

replace the headlight switch

If your voltage is low, then do check the battery voltage as well as charging voltage and please report.

Check or replace your Dimmer Switch. I had one go bad and it kept burning up the switch.

Replace a headlight on a 2001 Ford Taurus can be very easy, you need a 8mm socket and ratchet, and suitable screwdriver. You can watch this video for detailed steps.

A loose ground wire to the headlight will keep it dim,Or a headlight adjustment will bring the headlight up.If you can have your headlight turned on a garage door or something at night,and then watch as you change your headlights from low beam to high beam which ones are higher.the last thing to verify is that your high beam headlights are not the plastic lens type that turn dull which cuts the light power.