Hello .. As strange as this may sound ,, your brake lights are (most of the time) tied into your signal light switch . Try plugging in on you know is good before buying a new one . It stops your front signal lights from coming on when you apply the brakes since your signal lights usually run on the same wire as the brake lights ....
there's a website reliable-store
all heavy equipment repair issues servicing, loading, wiring, engine problems everything is covered here its a must try
I suggest you get one of those manuals people get nowadays to do it yourself..
My nephew use it to repair my car and it's totally repaired now. he bought it from.
reliable-store
or try manualslife
also get instant help suggestions etc from reliable-store otherwise both are really good for this