healdlights wont turn off! HELP!

[TXPureheart]

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I have a '99 Catera..and the headlights wont turn off. This happened a few months ago and the dealer replaced all the sensors..and no problems. Then the other day it happened again, PLUS the horn started beeping I dont know why and could get it to stop. After a time, they both stopped.

Any ideas???

Thank you,
Penny~

[TXPureheart]

I write today because it happened again, and now Ive unhooked the battery....

Penny~