Well, I can tell you what it usually is. I use to have a Cessna shop back
in Michigan and most of the time this was cause by the failure of the
overvoltage protection relay. In fact Cessna has a service letter on it
that requires you to place a capacitor in line with it because this relay
has a tendency to kick off too easily as it gets older. I don't recall what
year Cessna incorporated it into manufacturing but it was in the early 70's.

It shows up the way you described, occasionally at first and then more often
until finally you won't be able to recycle it back on. I had to replace one
on my 172 last year, same symptoms. It's located in the wire bundle behind
the CB panel on the pilots side on most models. A cylinder about 3-4 inches
long, 1 inch in diameter with 3 wires.

You can get them from Cessna or for less money under STC from Chief and
other suppliers. They're listed on their web site.

"WinstonCup" wrote in message
...
I have a 1978 C182 Q. I recently experienced my alternator turning off and
the
high voltage light coming on. I cycled the switch (1/2 master) and got it
to
reset every time, however, the interval between episodes varied. I had
the
Voltage Regulator and the Alternator replaced (new) and flew a couple of
flights since with no problem... until my last flight. Last flight it
happened
again. The Alternator switched off and the high voltage light came on. I
cycled the switch and it reset.

What else is causing this? Is it a bad switch? Loose connection at the
bus?

Has anyone else experienced this and what was your solution?

Any feedback is appreciated.

K C
PP ASEL IA
N759JB