Sealey Battery/Alternator Tester - 12V - LED Indicators

This Sealey Battery/Alternator Tester is designed exclusively for 12V automotive electrical systems.

The tester uses specific LED patterns to indicate battery health. Typically, green LEDs suggest a good battery, yellow may indicate weak, and red suggests bad or requires charging. Refer to the product's manual for exact LED interpretations.

This tester primarily diagnoses the battery and alternator. While a faulty starter motor can drain a battery, this tester won't directly diagnose starter motor issues itself. It helps identify if the battery or charging system is at fault, which could be related to starting problems.

It's recommended to use the tester periodically, perhaps every few months, or whenever you suspect an issue with your vehicle's starting or electrical system, such as slow cranking or dim lights.

Yes, always ensure the vehicle's ignition is turned OFF before connecting or disconnecting the tester to avoid electrical damage or injury.

If the alternator LED indicates a fault, it suggests the alternator is not charging the battery correctly, potentially leading to a discharged battery and vehicle breakdown. This may require further inspection or repair of the alternator.

Ensure the crocodile clips are securely attached to the correct battery terminals (red to positive, black to negative). Check that the battery has some charge. Inspect the cables and clips for damage.

Verify the clips are making good contact. Test the alternator's charging function. A faulty alternator can prevent a new battery from charging properly. Ensure the tester is correctly interpreting the LED signals.

Check all connections. Try testing the battery under load (e.g., with headlights on momentarily before testing, if safe to do so) to see if the alternator output drops significantly. The tester provides a basic check; a more comprehensive diagnostic may be needed.