3.5-36V DC Electric Circuit Tester – Essential Automotive Diagnostic Tool

Wide Voltage Range
Accurately tests circuits from 3.5V to 36V DC, compatible with most vehicles, motorcycles, and marine electrical systems.
Durable & Compact Design
High-quality ABS housing with reinforced probes withstands drops and harsh workshop conditions. Slim profile fits tight spaces.
Built-In Power Switch
Prevents battery drain with an easy on/off switch—no accidental power loss during storage.
Clear LED Indicators
Bright LEDs instantly show voltage presence and polarity, eliminating guesswork in dark engine bays.
Versatile Applications
Quickly diagnose blown fuses, faulty relays, or wiring issues in cars, trucks, RVs, and DIY projects.
Direct Power Detection
No external power needed—self-powered design checks live circuits safely without additional tools.
Ergonomic Grip
Non-slip handle ensures steady control even with gloves, ideal for professional mechanics or home garages.
Universal Compatibility
Works with 12V/24V systems, trailers, and low-voltage electronics—perfect for troubleshooting on the go.