Taking the plunge

Ignition 2 sends a higher voltage to the coil for cranking only.
That part is all good. "Fuse for gauges" lost me. Ther's not a fuse spacificly for the gauges.

Aftermarket wiring kits are ez at engine and such. The puzzles with them are wipers, heater, and the like. It wont replace your gauges and will not fix your problem with that circuit.