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Page Title:
BATTERIES FAIL TO MAINTAIN CHARGE |
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 TM 9-2320-285-24-1
2-23.
BATTERY SYSTEM TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
BATTERIES FAIL TO MAINTAIN CHARGE
Step 1.
Turn key switch to on position.
Pull out headlight switch to first detent position.
With engine shut down, note voltmeter indication.
Then start engine, run at 1200 rpm, and watch voltmeter.
a.
If voltmeter pointer does not move from lower green arc to upper green arc when engine is run, go to
step 3 below.
b.
If voltmeter pointer moves from lower green arc to upper green arc when engine is run, go to step 2
below.
Step 2.
Pull out headlight switch to first detent position.
Start engine and run at 1200 rpm; immediately watch ammeter pointer.
a.
If ammeter indicates plus (+) side of zero, go to step 5 below.
b.
If ammeter does not indicate plus (+) side of zero, go to step 3 below.
WARNING
Battery electrolyte is toxic and corrosive. Use protective goggles and
gloves when performing the following. Avoid contact with skin, eyes,
clothes, and don't breathe vapors.
Step 3.
Check level of electrolyte in batteries.
a.
If electrolyte level is below plates of any cell, add distilled water to bring level 3/8 inch above plates (para
b.
If electrolyte level is okay, go to step 4 below.
Step 4.
Check for loose battery cables or broken battery terminal lugs.
a.
If battery cables are loose, tighten (paragraph 2-34a).
b.
If battery terminal lugs are broken, replace (para 2-34a).
c.
If battery cables and terminal lugs are okay, go to step 5.
Step 5.
Inspect battery posts and terminal lugs for corrosion.
a.
If corrosion is observed, remove (para 2-34a).
b.
If corrosion is not observed, refer to para 2-17, Malfunction 2.
2-192
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