Bit of an optical illusion then, they must be the correct overall diameter, or they wouldn't be legal.
I don't know if it's just me but, they look a bit too small.
I use it, I've lost count the number of times I've said, " mate your NS/OS brake light is out (delete as necessary) " usual response being, "...
Front and back?
I think I would remove the alternator and do it on the bench/kitchen table.
I'll give it a twirl.
Brake pressure switch is on the Abs pump, iirc.
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