FEATURES:

• Tests batteries, alternators, regulators, and starters. Direct-from-battery tachometer feature gives RPM readings without complicated hookups to ignition system. Also, ammeter/voltmeter capabilities.
• Evaluates discharged or charged batteries in one minute. Tests all 12-volt automotive and heavy-duty batteries with cold cranking amp ratings of 100-2000.
• Has its own internal battery; no external power source needed.
• Checks charging system at high RPMs and at idle, and stores the data. Results show regulator volts, peak amps, and diode condition. Utilizes wave form analysis when testing alternator diodes; more accurate than “ripple voltage” tests.
• Displays cranking volts and amps, indicates either "Good Starter" or "Bad Starter."

CATEGORIES OTC-3131AGM IN: Electronic & Battery Diagnostics, Otc - Misc