My 60 amp Plane-Power alternator's field fuse occasionally is blown during engine start using a Sky-Tec inline starter. P-P is at a loss to explain why.
This never happens if the field circuit is open during start - no surprise there - but if powered even a 10 amp fuse is occasionally blown. The alternator field excitation power is pulled off the main fuse block, but no other circuit's fuses are ever blown, likely because nothing else is turned on during cranking. But the battery buss would be exposed to any nasty spikes that kill the field fuse, and all those circuits (like fuel pump, ignitions, clock, keep-alives) survive.
I'm open for guesses and hunches to explore where this killer current is coming from.
John Siebold
This never happens if the field circuit is open during start - no surprise there - but if powered even a 10 amp fuse is occasionally blown. The alternator field excitation power is pulled off the main fuse block, but no other circuit's fuses are ever blown, likely because nothing else is turned on during cranking. But the battery buss would be exposed to any nasty spikes that kill the field fuse, and all those circuits (like fuel pump, ignitions, clock, keep-alives) survive.
I'm open for guesses and hunches to explore where this killer current is coming from.
John Siebold