Also Retro I popped in a 5A slow blow fuse which I had and that is no blowing. I did discover two pops are not working, one is the one I disconnected as I thought that was the initial problem, the other is connected but not doing anything so I suspect that is the one with a blown coil.
Does this sound correct

Dont put a 5A slo in.. only use a 3A. Basically, if you have a short then 5A isnt going to last either so its not really an issue, just not good practice to replace with bigger values ( ill get shot down by the forum guys if i sanctioned this.. these things are done in private!  )

Other bumper may be connected, but when you disconnected the first one, did you twist the wires together that were ganged? The power feed daisy chains so the wires are joined.. if you pull them apart then you prevent any power going further down the line. DONT JOIN ALL THE WIRES TOGETHER... only those that were joined when on each side of the coil... dose this make sense?