TM 5-3825-270-23&P
0030
CONDITION/INDICATION
Are 24.2 to 25.4 VDC measured at batteries with multimeter?
DECISION
No - Service (WP 0082) or replace batteries. (WP 0086) Verify problem is solved. (Step 3 - Does BATTERY
VOLTAGE gauge read normal?)
Yes - Go to step 2. (Step 2 - Do batteries read more than 28 VDC with multimeter while engine is running?)
STEP 2
Do batteries read more than 28 VDC with multimeter while engine is running?
WARNING
Remove all jewelry such as rings, ID tags, bracelets, etc., prior to working on or around
vehicle. Jewelry and tools can catch on equipment, contact positive electrical circuits, and
cause a direct short, severe burns, or electrical shock. Failure to comply may result in injury
or death to personnel.
1.
Start engine. (TM 5-3825-270-10)
2.
Ensure multimeter is set to measure voltage.
3.
Connect red multimeter probe to positive battery terminal.
4.
Connect black multimeter probe to negative battery terminal.
POSITIVE
NEGATIVE
BATTERY
BATTERY
TERMINAL
TERMINAL
Figure 2. Battery Terminals - Step 2.
5.
Note multimeter reading.
CONDITION/INDICATION
Do batteries read more than 28 VDC with multimeter while engine is running?
DECISION
No - Replace battery voltage gauge. (WP 0087) Verify problem is solved. (Step 3 - Does BATTERY VOLTAGE
gauge read normal?)
Yes - Alternator is overcharging batteries. Replace alternator. (WP 0081) Verify problem is solved. (Step 3 -
Does BATTERY VOLTAGE gauge read normal?)