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Table 2-2. Electrical Troubleshooting (Con’t) | Up
/.25ton/TM-9-2320-289-34 CUCV Series Trucks at intermediate direct support and general support level Manual | Next
Table 2-2. Electrical Troubleshooting (Con’t) |
TM 9-2320-289-34
Table 2-2. Electrical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 10. Check voltage at current/voltage regulator relay “A+” terminal.
if voltage is above 11.5, replace current/voltage regulator relay. (See
paragraph 4-4)
if there is no voltage, trace circuit to front battery positive (+) terminal. (See
wiring diagram E-10)
CAUTION
DO NOT continue rotating adjustment screw after resistance is felt.
Adjustment screw adjustment should never exceed 3/4 turn. Failure to
follow this caution may damage adjustment screw and require
replacement of current/voltage regulator.
Step 11. Start engine, bring to full operating temperature, then shut off. Remove
10 amp/28 v (voltmeter) fuse. (See TM 9-2320-289-20) Adjust current/voitage
regulator adjustment screw completely clockwise. Connect tachometer in
accordance wit h manufacturer’s instructions.
Start engine and operate at
1200-1500 rpm. Check voltage at upper alternator positive (+) terminal for at least
30 seconds.
if voltage is 15.5-16.5, replace current/voltage regulator. (See paragraph
4-4) Repeat this step.
if voltage is 28.5-29,1, perform step 12.
if voltage is not 28.5-29.1, perform step 16.
CAUTION
DO NOT continue rotating adjustment screw after resistance is felt.
Adjustment screw adjustment should never exceed 3/4 turn. Failure to
follow this caution may damage adjustment screw and require
replacement of current/voltage regulator.
Step 12. Adjust current/voltage regulator adjustment screw completely counterclockwise
and check voltage at upper alternator positive (+) terminal for at least 30 seconds.
if voltage drops to 15,5-16.5, seal adjustment screw (see paragraph 4-4,
iNSTALLATION, step 1 ) and perform step 15.
if voltage does not drop to 15.5-16.5, perform step 13.
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