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.
Patented 45° Swivel Head for Easy Access – The 5420’s angled swivel probe pivots 45 degrees to reach tight spots and awkward connectors you couldn’t with a straight probe; ideal for under dashboards, inside fuse boxes, and cramped engine bays.
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.
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.
Shipping takes place within 3-5 business days. If there is a problem with the shipment of the product, we will notify you via the email address you entered when ordering.
We do not currently offer free shipping. However, this may be added at some point. We apologize.
If your order has been shipped, we will add the tracking number to your order and notify you via the email address you entered when ordering.
For returns or exchanges, please contact us within 14 days of receiving the product, along with a receipt or screenshot of the purchase, and a photo of the product with the packaging or tag intact.
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