3-49. ALTERNATOR REPAIR (CONT)
Diode Trio Testing
Disassemble alternator (subpara e).
Connect one lead of multimeter to the single connector.
Connect other lead to one of three connectors. Check reading.
A good diode trio will give one high and one low reading.
If both readings are the same, replace diode trio.
Repeat steps 1 thru 5 between the single connector and each of the other two connectors.
Connect the multimeter to each adjacent pair of terminals (a total of four checks).
If any reading is infinity, replace connector body.