C-22 wiring
Randy:The colors in the wiring schematic and what you have in your boat vary, as they did on my ‘81 C-22 that has the same wiring schematic as yours.The four wires from the port side that you describe as two sets of black and red wires I think are the following:1. positive for the port interior light and v-berth light (this is a single wire that splits or continues after the port interior light to go onto the v-berth light)2. positive for the bow (red and green) light3. positive for the steaming or mast light4. common ground for the above three that should go to the negative battery terminalYou need to check for continuity in these wires.I would start by checking for continuity in the common ground at the bow light. I would attach one end of your meter to the white wire in the bow for the bow light (this should be ground) and then the other to each of the four wires aft until your meter beeps continuity.When your meter beeps continuity, then you must establish wether you have the common ground for the port side wires or just the positive lead for the bow light. To verify this, go to the port side interior light, remove the cover and the bulb. Attach the lead of your meter that you attached to the white wire in the bow to the metal cylinder that houses the bulb and see if your meter beeps. If the meter does not beep, then attach the meter lead to the small metal tap in the cylinder. In either case, if the meter beeps, you have verified that you have the common ground for the port side.If your meter does not beep when connected between the white bow wire and one of the wires aft, then attach the meter to the red bow wire and to each of the four aft wires until it beeps and then repeat the verification process on the port side interior light. If the meter does not beep in this verification, you have detected that the red bow wire is a positive lead.So good luck, I hope this helps.If your meter does not beep at all when checking the bow wires, then it is a good bet that