DeWalt DXAEPS2 Instruction Manual page 17

2. This check may not be accurate for every make, manufacturer and
model of vehicle. Check only 12 volt systems.
PART 1
No Load (turn OFF all vehicle's accessories): The vehicle battery
must be fully charged before testing the alternator. Run the engine
long enough to achieve normal idle speed and verify there is a no-load
voltage.
1. Press the Alternator Check Button to start the check. The backlit
LCD screen will display the following to indicate the unit is analyzing
the alternator:
The Battery Status Icon will light solid and the Alternator Icon will
flash.
2. If the unit detects that the alternator is good, the backlit LCD screen
will display the following:
The Battery Status Icon, Alternator Icon, and "ALT GOOD" will light
solid.
DXAEPS2_ManualENSP_101216.indd 17
3. If the unit detects that the alternator is out of typical voltage range,
the backlit LCD screen will display the following:
The Battery Status Icon, Alternator Icon and "ALT" will light solid.
The Fault Icon will flash.
4. Press the Alternator Check Button again to stop the test and turn
off the unit.
PART 2
Under Load (accessories ON): Next, load the alternator by turning
on as many accessories as possible (except for A/C and Defrost).
1. Press the Alternator Check Button to start the check. The backlit
LCD screen will display the following to indicate the unit is analyzing
the alternator:
The Battery Status Icon will light solid and the Alternator Icon will
flash.
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