Alternator Performance Tester - Motomaster ELIMINATOR 11-1586-4 Owner's Manual

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OTHER LEDs AND FEATURES (cont'd)
Tester and Charger – When first turned on, the unit operates only as a tester, not as a charger. To
continue to use it only as a tester, avoid pressing the AUTO button or the TIMER button. Selecting a
time or pressing the AUTO button activates the battery charger and deactivates the tester.
Testing after Charging – To change the battery charger back to a tester, press the Timer button
until the LED next to the OFF position (O) is lit. Then press the Display button until the VOLTS LED is lit.

Alternator Performance Tester

Overview – This battery charger has a built-in alternator tester that displays an estimate of the
alternator's relative output compared to normal alternators. The alternator percentage values
displayed should be taken as a general reference, not a precise diagnosis. The alternator tester
functions like the built-in battery voltage tester (see previous section for details) with a few differences.
Testing Sequence – There are five basic steps required to operate this unit as an alternator tester:
1. With the charger unplugged from the AC outlet, connect the charger to the battery following the
instructions given in Connecting Your Battery.
2. Plug the charger AC power cord into the AC outlet, following the instructions given in Charging Your
Battery.
3. Place the Function switch in the down (20/2 A) position
4. Make sure the LED on the timer is next to the OFF (O) position.
5. Start the vehicle and turn on the vehicle's headlights. Read the voltage on the digital display.
Compare the voltage reading to the chart below.
12 V Alternator Reading
14.6 or more
13.5 to 14.5
Less than 13.4
General Charging Notes
Fan – The charger is designed to control its cooling fan for efficient operation. Consequently, it is
normal for the fan to start and stop when maintaining a fully charged battery. The fan does not
run in Tester Mode. Keep the area near the charger clear of obstructions to allow the fan to operate
efficiently.
Restart – If the Charge Mode is changed after charging has started (by pressing the CHARGE RATE
button), the charging process will restart.
.
Alternator Condition
Have it checked
Working
Have it checked