TeddyMac

In automatic on/off mode, my lights automatically turn on (regardless of light conditions) at ignition, but the problem is they no longer turn off in daylight conditions ... that is, they stay on all the time. The auto function itself seems to continue to work, in that the lights do turn off automatically and normally after you turn the engine off.

Trying to figure which part(s) to replace, I don't know if the problem is in the daylight sensor itself (wherever it is -- I don't know), or in a relay somewhere along the line, or the switch itself. Thanks for any help.

jwko

I had the same problem with my GMC truck. Turned out to be a build-up of armour all and dust on the sensor. Mine is on the dash but have seen them on the rearview mirror as well.

tbird100636

Probably a bad sunload sensor on top of the dash. When the one on my 2001 Taurus SEL went the sensitivity went way up- the lights would come on when there was only minimal clouds in the sky, and my EATC was throwing a code for it when I ran the EATC's diagnostic mode. Don't remember the exact price but it was relatively inexpensive at the Ford dealer.

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Master ASE Certified L1 Chrysler Technician- still a Ford fan at heart.
1964 Thunderbird Hardtop- Chantily Beige- 390 FE 4V V8-Uncle's Car
1966 Thunderbird Convertible- Red- 390 FE 4V V8- Uncle's other car- waiting for paint and body work!!!
1967 Mustang Convertible- Blue- 289 V8- helping a friend re-assemble this classic