Two things I see in the pictures:
1-Why is the needle on the gauge pointing off to one side?
With no power applied, it should be resting just to the
right of the lower leg of the 'E'.
2- That blue coil. Unless they've used a varnish with a
coloring in it, which I haven't seen before, looks like it's
been over heated, which I have seen before. Assuming that is
a 6v meter movement, was it connected to 12v at some point in
the process??? If so, then it's possible that it's shorted
somewhere in the coil.
dg