Hello Fellow Owners, When I got my '56 a week ago, the turn signal showed a flickering (constant almost) light both at the four corners as well as the inside indicators, instead of a definite normal signal. I figured it needed a new flasher, so I replaced the 550 flasher with same type. After inserting it, and still looking at it under the dash, I turned the ignition on and got a spark!! I went ahead and put the turn signal lever left and then right, and it worked like it should, all day. Two days later (today), I drove the car, and lo and behold, NO TURN SIGNAL OPERATION WHATSOEVER!! I am not a mechanic in any sense of the word, so I'm asking what could have caused this, before inserting another flasher, and possibly blowing more $$$$$. Is this Heavy Duty Flasher #550 (3 prong), 12 Volt correct, in the first place??? This flasher says to use a 14 amp fuse in input lead. I don't see a fuse in line, at all. This model doesn't have a fuse box, so it must be somewhere back there, right? Thank you very much for your help. Tony