It seems my backup alternator has (or wiring or regulator) has failed. It’s a 40amp B&C with LR3C regulator.
Alternator one shows 14 V and current flow. Alt two instead makes the bus voltage drop to 12V and no current.
I have gone through the entire B&C troubleshooting guide and find no issue.
Oh
I callled B&C tech support and they are stumped. Alternator has been on the engine for 200 hours and used hardly ever (checks mostly).
Here’s what I have checked so far:
Battery to pin 7: .2 ohms
Battery to engine case : .4 ohms
Master on (primary battery) bus voltage: 12V
Pin3 voltage: 11.93 volts
Pin 6: 11.76V
Pin 4: 10.53V
Alternator field resistance: 7 ohms
Field voltage 10.5V
B-lead: 11.98 volts
Yesterday I did an engine run while checking voltage at B lead and around the fuse and shut, all showed battery voltage (12V)
I made sure the alternator turns inside when I move the prop.
Any other ideas?
-Craig
Alternator one shows 14 V and current flow. Alt two instead makes the bus voltage drop to 12V and no current.
I have gone through the entire B&C troubleshooting guide and find no issue.
Oh
I callled B&C tech support and they are stumped. Alternator has been on the engine for 200 hours and used hardly ever (checks mostly).
Here’s what I have checked so far:
Battery to pin 7: .2 ohms
Battery to engine case : .4 ohms
Master on (primary battery) bus voltage: 12V
Pin3 voltage: 11.93 volts
Pin 6: 11.76V
Pin 4: 10.53V
Alternator field resistance: 7 ohms
Field voltage 10.5V
B-lead: 11.98 volts
Yesterday I did an engine run while checking voltage at B lead and around the fuse and shut, all showed battery voltage (12V)
I made sure the alternator turns inside when I move the prop.
Any other ideas?
-Craig