Nutmeg I can see why you are confused. I never could find info about the in-line fuse for the horns and was asking about that but somewhere we got off track and discussed fuse box fuses. RGK - Looks like Triumph could not make up their mind on the TR4. Your manual shows 35 and Nutmeg's previous post shows 25 in his manual. For my TR4A it looks like 35 across the board. Bruce