TM 5-2410-241-23-1
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TEST STEP 1: GROUND CABLES
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1. Verify all battery cable connections are clean and tight.
2. Turn battery disconnect switch to the ON position (TM 5-2410-241-10).
3. Using a digital multimeter (WP 0296), measure voltage between positive post (Figure 1, Item 1) and negative
post (Figure 1, Item 2) of the batteries (Figure 1, Item 4). Monitor and record voltage.
4. Using a digital multimeter (WP 0296), measure voltage between positive post (Figure 1, Item 1) and machine
ground at the starter motor (Figure 1, Item 3). Voltage drop should be within 1 volt of value recorded in step 3,
or the ground is faulty.
a. If voltage drop is greater than 1 volt of value recorded in step 3, proceed to step 5 to isolate ground fault.
b. If voltage drop is within 1 volt of value recorded in step 3 machine negative battery cables are OK up to the
starter, proceed to step 10 to check negative battery cables at alternator.
Figure 1. Positive and Negative Battery Voltage Test.
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