Innova 5420 Power Circuit Tester for Automotive | Fuse, Relay, Battery, and Circuit Diagnostics | Voltage Tester, Multimeter, Relay Tester, Short Circuit Finder, 12V/24V with LCD & Circuit Breaker

Whether you're working on 12V or 24V automotive systems, the Innova 5420 is your go-to diagnostic solution. From fuses to relays to short circuits, this powerful tester can be replaced with a circuit tester and allows mechanics to apply power directly to components to observe real-time reactions. The intuitive voltage tester lets you trace faults with precision and identify electrical issues quickly—no unnecessary disassembly required.\n\nThe Innova 5420 blends the functions of a multimeter tester, circuit tracer, relay tester, and fuse tester into one robust tool. Built for mechanics and auto electricians, it's ideal for garages and toolboxes alike. Conduct ground tests, power supply checks, and even injector or ignition coil diagnostics—all with one device built to streamline complex workflows.\n\nWith a rugged 20-foot heavy-duty cable, this tester is ready for demanding environments where flexibility and reach matter. Its 10 MegOhm input impedance ensures safe testing across sensitive circuits without risking component damage. It’s the ideal tester electric option for those who demand both power and protection in their automotive electrical tools.\n\nEquipped with a bright 1.25” backlit LCD screen, this tester provides clear voltage readings even in dimly lit garages. LED indicators reveal polarity and continuity instantly, eliminating second-guessing. Designed with the needs of mechanics in mind, it turns complex diagnoses into fast, accurate procedures—ideal for testing spark plugs, circuits, relays, and more.\n\nProtection is built-in with a 10 MegOhm circuit breaker that automatically halts overloads. This feature safeguards users and vehicles alike, whether you're working on an alternator, trailer wiring, or tracing a short circuit. The tester supports DC diagnostics and is a perfect addition to any automotive toolkit, letting you work smarter—not harder.

• ‌Power Up Diagnostics with Confidence – Apply 3V, 5V, 12V, or 24V to activate components & test fuses, relays, circuits, and more. Identify faults fast with this pro-grade voltage tester.
• Multifunction Testing in One Tool – Combine fuse tester, relay tester, continuity checker & power supply probe in one compact device built for mechanics & automotive electricians.
• Built for Heavy-Duty Use – Durable 20ft cable handles garage abuse, while 10 MegOhm input impedance ensures safe testing on sensitive circuits. Perfect for automotive tools kits.
• Instant Results, Bright Display – Large 1.25" backlit LCD and LED polarity indicators clearly show voltage, continuity, or shorts—even in low light. Spark plug & circuit machine ready.
• No Guesswork, Just Clarity – Trigger components directly & see if they respond, so you pinpoint faulty relays or switches without removing them. Save time and second guesses.
• Rugged Safety Features Built In – Integrated 10 MegOhm circuit breaker prevents overloads. DC capable, compatible with all common car diagnostic tool needs.