I'm having a problem with my taillight it works but when you sqweeze the brake handle the light doesn't get bright i replaced the hole piece that fits in the back of the seat and it still does it any info would be great i forgot to add its a 1999 ski-doo fIII 800 Thanks

try your brake switch on your brake handle. Mine went last year on my 97 mxz670. A voltage tester will help.