R31CB CO alarm power

[bill46]

Where do the CO alarms get their power. Both stopped working.. Wish there was a wiring diagram for R31 CB.
Thanks.

 

[knotflying]

Not sure on the 31, but it should get its power before the switch on the house batteries. Take a look at the switch and there may be a cluster of in line fuses. One of the fuses should be for the co detector. There should be a label on the side of the wire identifying what each fuse is. I used a white paint marker and numbered each cap and I then put an index in my maintenance log identifying each number to the item it connected to. It helps when you have an alarm sounding at 2:00am and you want to silence it. It is easier to read the index than crouching down and trying to read labels with a flashlight.

 

[bill46]

Found them. On thruster fuse block under cockpit sink. Bilge pumps also here. Was one fuse that needed reseating, and one detector that needed power cable reseated.

Working on list of all breaker and fuse locations. Next is tracing, or removing fuses powering Garmin stuff, none are marked. Then command bridge, very uncomfortable laying under it. Will share when done.