Harbor Freight Tools 12V Product manual

Read and undeRstand all waRnings and instRuctions befoRe use.

to test an alternator:

1. With the car located in a well-ventilated area (due to risk of carbon

monoxide poisoning), the parking brake set, all accessories off, and the transmission in neutral/park, start the car and allow car to run for several minutes. Plug in meter.

2. Read scale from the left part of the tester and compare with following chart: leds lit

Red green Yellow

YES

NO

NO

YES

YES

NO

YES

YES

YES

NO NO NO approx.

Voltage alternator status

>14.8

Overcharging

13.4-14.8 Normal

13.2-13.4 Charging Inadequately

< 13.2

Malfunctioning

to test a battery:

1. With the car’s engine cold (at least 30 minutes after last use) and all accessories off, turn the key to the accessory or on position without starting the engine. Plug in the meter.

2. Read scale from the right part of the tester and compare with following chart:

LEDs Lit

Red Yellow Green

YES

YES

YES

YES

Approx.

Voltage

Battery

Status

YES >12.6

Fully Charged

BLINK 12.4-12.6

NO 12.1-12.4

Weak

YES

YES

BLINK

NO

NO

NO

11.8-12.1

Almost Dead

< 11.8

Dead note: the charts above assume that the rest of the car is in perfect repair. Poor

connections, wiring problems, or many other factors can cause a poor reading.

always have a professional mechanic thoroughly investigate any automotive

problems before performing repairs.

1.

2.

3.

4.

caution

to prevent injury and property damage:

Keep away from children.

Wear ANSI-approved safety goggles and heavy-duty work gloves during use. Remove any jewelry before working on vehicle’s battery.

Use as intended only.

Inspect before every use; do not use if damaged.

SAVE thESE inStRuctionS.

For technical questions, please call 1-800-444-3353.