[Marks842]

Have a 1992 mariah diablo, don't have power for bilge pump, blower, lights, etc. none of toggle switches have power. Any suggestions what problem might be?

[nkhagen]

Well, while diagnosing electrical 3rd hand is tricky, I'll tell you what has bitten me in the past on my Mariahs. First off check all the resettable breakers. From there take a look at your battery connections and make sure you have no wires left off. Along that line, both my Mariah's have a common ground panel in the stern mounted to the transom. There is one wire on it that grounds that panel to either the batteries or the battery cables. Be sure this one is hooked up! On both boats I have fought issues with the wiring and on both boats it was this wire.
Good luck!
Nick

[lumbercitybravest]

Check the fuse panel. I Had a ton of issues with bilge, running lights, interior lights etc. I ended up pulling out each glass fuse, and cleaning up the contacts with some sandpaper and a small emery board. Then I took each blade connector off and did the same thing. I have a 95 Davanti, so most of this was done laying on my back and looking up. Hope this helps.