Atd Tools Primary Circuit Tester

Features and Benefits:

• Features:
• Tests 6 and 12V
• Locates shorts, open circuits and grounds
• Use with ignition on
• Clip to ground anywhere on vehicle and use probe to make contact with wire or cable being tested
• Bulb indicates condition of circuit
• Shipping Weight: 0.1 lbs.Available Accessories:ATD-5506 - Replacement Bulb



This is a fundamental "test light" designed for quickly diagnosing electrical issues in 6V and 12V systems. It is an essential tool for identifying shorts, open circuits, and grounds in automotive wiring. By clipping the lead to a known ground and using the probe to pierce or touch a wire, the internal bulb provides immediate visual confirmation of whether a circuit is "hot."