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Troubleshooting an Alternator

crxcte

By crxcte
in Vintage Mooneys (pre-J models)

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crxcte Community Regular

crxcte

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After becoming airborn today I noticed my alternator indicator was slightly negative rather than positive in a 68 20F.  About 8 years ago that meant my alternator was not working.  I checked the wires connected to the alternator, and reset the breakers (none seemed popped).  Can someone recommend a troubleshooting method?  Can the alternator be tested without removing? 

N601RX Grand Master

N601RX

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Quote: crxcte

After becoming airborn today I noticed my alternator indicator was slightly negative rather than positive in a 68 20F.  About 8 years ago that meant my alternator was not working.  I checked the wires connected to the alternator, and reset the breakers (none seemed popped).  Can someone recommend a troubleshooting method?  Can the alternator be tested without removing? 

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