Just wanted to see if anyone else had this problem. We are having a hard time finding the source that triggers the low voltage light. Here is what happens and a summary of what we have fixed:
The plane is a turbo 182 (1981).
On the way to Oshkosh low voltage light comes (indicates discharge on JPI of 23.4 volts) on after 30 mins of flying. Follow the procedure in the POH (turn off radios, turn off master, turn on master, turn radios on) and the the system resets and the low voltage light disappears. The battery is being charged showing 28.3 volts on the JPI. As the flight proceeds the low voltage light comes on 10 mins, 5 mins, sometimes every 2 mins. Each time it is reset. The longer the flight the more frequent the low voltage light comes on. It does not come on during descent or around the pattern or on the ground. Only climbing or level flight (maybe something to do with engine cowl temperature?)We landed and replaced the alternator which was 10 years old. Test flew the plane and 1st hour of flight LV comes on. Replaced the master switch which had corroded wires. Same issue on test flight. Limped the plane back to California and replaced main wire from alternator, replaced wire from battery, checked all grounds and replaced the voltage regulator. Same problem after 30 mins of flight. During flight we have tried to isolate the problem to a piece of electronics but the LV still comes on when each piece of equipment is shut off. Any similar problems out there?
Thanks
Sean
The plane is a turbo 182 (1981).
On the way to Oshkosh low voltage light comes (indicates discharge on JPI of 23.4 volts) on after 30 mins of flying. Follow the procedure in the POH (turn off radios, turn off master, turn on master, turn radios on) and the the system resets and the low voltage light disappears. The battery is being charged showing 28.3 volts on the JPI. As the flight proceeds the low voltage light comes on 10 mins, 5 mins, sometimes every 2 mins. Each time it is reset. The longer the flight the more frequent the low voltage light comes on. It does not come on during descent or around the pattern or on the ground. Only climbing or level flight (maybe something to do with engine cowl temperature?)We landed and replaced the alternator which was 10 years old. Test flew the plane and 1st hour of flight LV comes on. Replaced the master switch which had corroded wires. Same issue on test flight. Limped the plane back to California and replaced main wire from alternator, replaced wire from battery, checked all grounds and replaced the voltage regulator. Same problem after 30 mins of flight. During flight we have tried to isolate the problem to a piece of electronics but the LV still comes on when each piece of equipment is shut off. Any similar problems out there?
Thanks
Sean