high beam problem

[GMCmademe]

i got a 84 gmc k2500 and all i can get to come on is the low beam lights ill pull the turn signal switch back and forth but they still wont come on and some times ill be driving with the headlights on and the little blue high beam light comes on without me doing ne thing but yet no change in the brightness of light im stumped idk what it could be. any help?

 

[a_kelley]

bad low/high beam switch? bad relay?

 

[rattlecanpaint]

Or two bad high beam bulbs. Seen it before. Check that first.