Check your Overvoltage Relay!

[mshac]

For anyone interested, I sell a $400 kit that includes two Cessna 400-series aircraft voltage regulators, a wiring diagram, instructions, and an approved 337 form that has been successfully copied word-for-word.

True parallel alternators and voltage regulators is the way to go. It assures the load is being shared, not flipped completely from one alternator to the other.

Not sure what Cessna was thinking when they installed the Rube Goldberg approved factory system

The kits installs in under an hour, and the only NEW wire added to your aircraft is a paralleling wire that connect the two new voltage regulators.

Everything on your panel works the same, and there is no change to the POH.

The only difference is you won't see the alternator lights go on and off during your flight!