That low voltage will be a result of a backfeed, undersized wire or overloaded wire, corrosion in that length of wire to the front could cause such a problem (voltage drop).
Two wires from the switch won't let you use the system as an anchor light unless you have a ground at the sternlight location (which is possible).
The normal situation is to have each light wire pass by the switch, the grounds from each light (black wire) go to the fuse panel ground.
The switch will be a 3 position switch, off, on (stern lights), on (bow & stern lights).
Three wires will go to the switch, Common (fused hot), sternlight, bowlight.
However if you have a single pole switch then the bow and stern lights will come on together only and this would account for the way you're describing the wires. "2-bow, 2-stern, 2-switch".
If that is the case, at the sternlight tie all the blacks (3) together, then tie all the reds (3) together, take a reading to see if you got 12 volts at that location.
Look at the switch and see where the wire comming from the stern light is going to and make sure the ground is connected to the fuse bus ground.
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'75 Cuddy with '00 Johnson Ocean Pro 150 horse
Benny
Last edited by tsubaki; 05-15-2008 at 02:42 PM.
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