Hey guys. I am having issues with my horn not working. I checked in my manuals and it looks like there is c.b. in the headlight switch that controls the horns. My question is how do you remove the headlight switch. I can get the switch from rockauto or ebay, but the removal is my question. do i pull the entire pull out or do i just remove the knob? thanks. BTW it's for my 74 XR7.