12V Car Battery Tester LED Alternator Analyzer Automotive Lead-Acid Diagnostic Tool - PrimeCables®

12V Car Battery Tester LED Alternator Analyzer Automotive Lead-Acid Diagnostic Tool - PrimeCables®

• Tests Battery & Alternator:Quickly checks 12V batteries and charging systems to help identify electrical issues.
• Color-Coded LED Indicators:Different LED colors clearly display the voltage status of the battery or alternator for easy reading.
• No Batteries Required:Powered directly by the vehicle for instant testing—no internal batteries needed.
• Identifies Common Charging Problems:Helps detect alternator diode failure, slipping belts, charging issues, and low battery conditions.
• Simple & Safe to Use:Just connect the probes to the battery terminals for fast and reliable testing—ideal for DIY users and mechanics.

Battery test
A. With engine off, touch the positive battery post with the red probe and the negative battery post with the black probe.
B. The glowing light will show battery condition.
TECH TIP: Some heavy duty high output batteries may show a reading above the number 3 light,
causing the number 4 light in the alternator section to glow. This does not indicate a problem.
Alternator Test
A. With engine running, touch positive battery post with the red probe and the negative battery post with the black probe.
B. The glowing light will show alternator output.
C. Light numbers show the following:
1. Bad alternator diode.
2. Normal condition.
3. Loose or slipping belt.
4. Normal condition.
5. Loose alternator bolt, corroded battery terminals.
6. Battery needs charge or cell is shorted.
TECH TIP: Always be sure belts are tight.