Thanks Mccannix for the pictures. Always knew there was some kind of difference between all the relays. All my 1971 Cars have the Key Buzzer Horn relay without the arm, all four cars. I also bought a stash of relays that have the arm and wondered why but never looked into this. I believe in the past I tried the arm relay in the buzzer location switching one for the other and both made everything work. This is on 1971 E Bodies, not sure if 1970s are different.