Factory Tach Install Question

[frankslagoon]

I installed a new in dash tach in the 63. But no worky.
Pink wire to ign. same hot wires as old tach at fuse box.
gray wire to dash lights. same plug as old tach at fuse box.
Brn. wire to neg. - side of coil. same as old tach.
Pink wire to + side of gauge.
Brn wire to - side of gauge.
I marked the backing plate to match terminals on the gauge before I put it in the dash. pos. side to pass. side and neg. side to drivers side
I think my dash is a 62 c 30 full gauge type. maybe I marked the terminals wrong ?
You guys see anything wrong ?