my bright lights stay on and wont shut off. i changed the all in one switch on 1999 Chevrolet Silverado 1500

all four headlights stay on when the headlights are on

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2 answers 7 comments
You mean the dimmer doesent work even after replacment? That is what i read.
yes
Does the hi beam ind. stay on all the time also? ANY work done on front of truck? Any work at all?
yes it does. we put a plow on it
Plow have lights? If so were they wired up to the truck? If so did your trouble start about that same time?
yes
Did you try removing ALL the connections made when you wired up plow lights? If so and you are sure everything is back like it was before
the plow deal have Body Control Module scanned to check for codes.
you have a brake pedal switch that is having issues....check for the operation...it seems like it is staying on all the time...
its the headlights not the taillights