Innova 5420 Power Circuit Tester for Automotive | 45° Swivel Head | Fuse, Relay, Battery, and Circuit Diagnostics | Voltage Tester, Multimeter, Relay Tester, Short Circuit Finder, 12V/24V
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Availability:
Only 7 left in stock, order soon!
Arrives
Friday, Mar 20
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Features
- 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 5420s angled swivel probe pivots 45 degrees to reach tight spots and awkward connectors you couldnt 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 shortseven 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.
Brand: Innova
Power Source: Battery Powered
Color: Green,Red
Item Weight: 1 Pounds
Min. Operating Voltage: 3 Volts
Brand: Innova
Power Source: Battery Powered
Color: Green,Red
Item Weight: 1 Pounds
Min. Operating Voltage: 3 Volts
Specification Met: CE, RoHS, UL
Measurement Type: Multimeter, Voltmeter
UPC: 042173154203
Manufacturer: Innova Electronics
Package Dimensions: 10.87 x 5.98 x 2.8 inches
Item Weight: 1 pounds
Item model number: 5420
Date First Available: April 29, 2022
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Mar 20
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Fantastic tool that I should have bought years ago. I got it on sale for well below the price of the other big brand names, and it's lived up to my expectations plus some. The pivot head makes it a lot easier to use under the dash and the voltage switch makes testing for wiring connectivity much easier. Highly recommend for any technician who does vehicle electrical repairs regularly
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Reviewed in the United States on October 5, 2025 by Genevieve Weiss
Great circuit tester tool for automotive applications.
Reviewed in the United States on August 22, 2025 by Nate
I never knew I've been missing such an important tool. For the longest time I've dismissed these power probes as nothing more than a gimmick not fully realizing how they work. Prior to this using multimeter was my go to, but this tool makes things so much easier and quicker to diagnose that it's a whole new category in itself. I bought this version because it has 3/5/12V options to send power, while others only did the 12V. To me that seemed important because many sensors/solenoids, run on lower voltage than 12V and you wouldn't want to fry them, or get misleading results from sending the wrong voltage to those parts. If you are on the fence about getting a power probe and you do automotive work quite often, I'd say get it, you'll thank yourself that you did.
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Reviewed in the United States on July 13, 2023 by Tech Expert
Better than I expected. The smaller size and pivot head really made a difference for testing circuits.
Reviewed in the United States on January 26, 2023 by james
The Innova 5420 powered tester is made in Taiwan. I used this tool to find a bad ground, to find a wear spot on a trailer light that was blowing fuses, and to test and replace bad wiring/lights on another trailer with brakes. The ability to power devices from the tester is a big plus to help find if the wiring or the device is the problem. This made quick work diagnosing two trailers with LED lights. The voltage readout is also handy. This one tool does a better job of handling the same situations where I would need two or three different diagnostic tools/meters. For the money, I expected to have a good case (not included). I recommend this tester. Formerly 5 stars Update: This tester does not have any current limiting device (fuse or circuit breaker) in the power cord. That is an issue if you ground out something that is sensitive like a 5V sensor. So....I added an inline fuse to my setup. For the money, Innova should have something factory to handle this, and not for me to add on. I'm taking off one star, but if I damage anything, I'll be back to deduct another star. 4 stars (for now)
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Reviewed in the United States on November 14, 2022 by Joe and Jane User
I like that it bends. Easy to use
Reviewed in the United States on January 7, 2023 by Haley Strader
Is good overall, i wish it had a case or bag. You have to connect it to battery in order to work.
Reviewed in the United States on August 29, 2025 by alko
IT WORKS
Reviewed in the United States on March 24, 2023 by Timothy wendler