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 TM 5-1940-277-20
TM 1940-20/2
Disconnect wire from F terminal on voltage regulator.
4.
Use a jumper wire (2) and connect the loose F terminal wire to the negative (-) terminal on voltage regulator.
5.
Turn master switch ON.
6.
Turn engine circuit switch ON.
7.
If warning light comes ON and stays ON, the regulator is bad. Go to step 8.
q
If warning light does not come ON and stay ON, the alternator is bad. Go to step 9.
q
Report defective control box assembly to direct support maintenance.
8.
Replace alternator (refer to paragraph 3-92).
9.
10.
Turn engine circuit switch OFF.
Turn master switch OFF.
11.
Disconnect the jumper wire and reconnect the wire to terminal F.
12.
13.
Replace voltage regulator cover with two screws (1) using flat tip screwdriver.
14.
Replace control box cover (refer to paragraph 3-110).
15.
Close engine hatch.
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