Always On Power Source for the Clock

[bob865]

Hey everyone.  The clock in my plane has stopped working.  Well, not completely.  It is intermittent.  One day I go out and it is running fine, another time it's not.  I assumed it was the clock itself since it was intermittent and the original mechanical clock.  I broke my cardinal rule to check power first and ordered a GT-50 since I also don't have a voltmeter in my plane and my OAT gauge is getting flakey.  Seemed like the perfect solution.  Anyway, I got it installed today and it didn't work.  I pulled out the old trusty meter and there was power.  Plugged the connector back in and it came up but the volt meter but immediately showed 2volts.  I pulled the connector and checked the voltage again and lo and behold it was 5-6 volts.  So it looks like somewhere there is something loose.  I cannot find the clock on the drawings to find out where we pull the always on power from.  Does anyone know where the always on power comes from?  Looking at the drawings, it pretty much has to come from a tap on the supply side of the main power contactor.  With that said, where is the main power contactor?

[Yetti]

There is a big ol solenoid that is behind the battery access panel on the rear middle of the empanage.  It turns on and off with the Main power switch.   There on the hot side you should find an inline fuse block.  Probably black and round and screw top.  It could be something to check.  If your battery is under the cowl ignore what I just said.

If you have an eyeball light it could be on the same circuit as the clock.

[carusoam]

There is an distinguished clock story around here somewhere...

i’ll Try and dig it out...

The main power switch seems to be hot all the time, the clock doesn’t draw much power...

the clock comes with a fuse too?

Best regards,

-a-

[carusoam]

This May be helpful...

-a-

[bob865]

That did it!  Changed the fuse and now all is working just as it should.  If I had done that first, probably wouldn't have had to replace the clock.  But now I have a clock, volt meter, timer, and at annual a temp gauge which is a nice improvement over the old analog clock.  Thanks for the help!