My co detectors have not worked since we bought the boat last year. I replaced the detectors with new ones and connected the wiring but they still have no power. Up until now we have been using battery operated ones but it really is time to get these working too.

The wire can be traced back to the where to wiper motor is but then turns into the wall and disappears.

Does anyone know where ithe wire goes or more importantly where the wires connect to power?