TM 5-3805-293-23-2
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ELECTRIC STARTING SYSTEM TEST
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General Information
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Power available during cranking varies according to temperature and condition of batteries
.
Table 1 shows voltages that are expected from battery at various temperature ranges.
C AU T I O N
Do not crank engine for more than 30 seconds. Allow starter to cool for 2 minutes before
cranking again. Never turn disconnect switch off while engine is running. Failure to follow
this caution may result in damage to equipment.
Test Step 1. Measure Voltage of Battery.
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N OT E
Do not measure voltage across cable post clamps.
1. Lift protective boots (Figure 1, Item 1) from negative battery terminal (Figure 1, Item 2) on rear battery, and
positive battery terminal (Figure 1, Item 3) on front battery.
2. Using a digital multimeter, measure voltage between the positive (Figure 1, Item 3) and negative (Figure 1,
Item 2) battery posts while cranking engine or attempting to crank engine.
a. If voltage is equal to or greater than voltage in Table 1, go to Test Step 2.
b. If battery voltage is less than voltage in Table 1, continue diagnostics.
Figure 1. Battery Test Points.
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