RPM Guage not working.
 

When I was installing an amp in my car I drilled through my firewall and went through my wire harness. I pulled my dashboard and soldered all the wires back together but the only thing that doesn't work now is my rpm gauge. Does anyone know what wires are important for it so that I can just run new wires from my dash cluster to my ECU and if there are any more wires I would have to run? Only thing that doesn't work is my rpm gauge. No engine light and I scanned my computer and have no codes except for a High voltage code for my Bank 1 sensor 2 O2 sensor but I have a cat delete.

99 Civic EX D16Y8 automatic trans


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