Running Lights Wiring Question

[greateastern]

I have a 1990 Hydra Sport 17500 Vector Center. My Bow light does not work I only have 6 Volts to the light, my stern light works fine. Started trouble shooting and found the wiring mess under the stern light 6 wires two brought the 12v over marked as stern light, 2 wires to the bow (I think) and two to the center (I Think) were the switch is. The switch has three possitions up all running lights/middle off/down stern light checked the ground which (I Think) is the grey wires. Can any one help me out with a wiring dirgram? Ohey one of the black wires looped back to the bow (not knowing any better I cut it not thinking) and did not mark it If I can get a wiring digram I will rewire the whole thing.
Thanks,
Great Eastern

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