It's an '88 F 150,and one front blinker is out,so I need to change the blub.. Simple,right? Well,I can't figger it out.. It's so bad I dreamed that "they" removed my brain,so I was carrying it around,wondering what I was wondering with!!!!! Anyhow,if one of you could tell me the combination to get into the thing ( in very simple words ) I'd be no end greatful. Thanks in advance..