---
product_id: 339898366
title: "INNOVA 3420 Smart Test Light/Circuit Tester"
brand: "innova"
price: "$103.03"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/339898366-innova-3420-smart-test-light-circuit-tester
store_origin: US
region: United States of America
---

# Tri-color LED indicators for instant diagnostics 6-foot leads for extended reach Battery-powered for cordless convenience INNOVA 3420 Smart Test Light/Circuit Tester

**Brand:** innova
**Price:** $103.03
**Availability:** ✅ In Stock

## Summary

> ⚡ Diagnose Like a Pro, Anywhere, Anytime!

## Quick Answers

- **What is this?** INNOVA 3420 Smart Test Light/Circuit Tester by innova
- **How much does it cost?** $103.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/339898366-innova-3420-smart-test-light-circuit-tester)

## Best For

- innova enthusiasts

## Why This Product

- Trusted innova brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Extended Reach for Tough Spots:** 6-foot leads and detachable clamps let you access hard-to-reach circuits
- • **Trusted American Craftsmanship:** Made in the USA by Equus Products, ensuring quality and reliability
- • **Transparent Handle with Smart LEDs:** Visual confirmation via white, red, and green lights reduces guesswork
- • **Cordless Freedom with Battery Power:** Operates on 3 AA batteries—no cords, no hassle
- • **Effortless Voltage & Ground Testing:** Quickly verify electrical connections with intuitive LED feedback

## Overview

The INNOVA 3420 Smart Test Light is a battery-powered voltage tester featuring 6-foot leads and detachable alligator clamps. Its transparent handle houses tri-color LEDs that instantly indicate proper connection, voltage presence, or ground detection. Designed for automotive and electronic diagnostics, this USA-made tool combines precision, portability, and user-friendly design to empower professionals and enthusiasts alike.

## Description

INNOVA 3420 Smart Test Light/Circuit Tester

## Features

- Best Quality
- Equus Products

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Innova |
| Power Source | Battery Powered |
| Style | Unique |
| Colour | Green,Red,White |
| Item Weight | 227 g |
| Item dimensions L x W x H | 16.5 x 4.4 x 26 Centimeters |
| Measurement Type | Voltage Tester |
| UPC | 666669941063 521375004948 031112406015 758353141870 790725488732 042173034208 999990982482 021112418323 421730342084 043994891513 523161038885 077348890945 |
| Manufacturer | Equus Products |
| Global Trade Identification Number | 00042173034208 |
| Country of Origin | USA |
| Model number | 3420 |
| Number of Memory Sticks | 1 |
| Product Dimensions | 16.51 x 4.45 x 26.04 cm; 226.8 g |
| Batteries | 3 AA batteries required. |
| Item model number | 3420 |
| Item Height | 10.25 Inches |
| Item Width | 1.75 Inches |
| Are batteries included? | No |

## Product Details

- **Brand:** Innova
- **Power Source:** Battery Powered
- **Style:** Unique
- **Colour:** Green,Red,White
- **Item Weight:** 227 g

## Images

![INNOVA 3420 Smart Test Light/Circuit Tester - Image 1](https://m.media-amazon.com/images/I/71nO3gQZgOS.jpg)
![INNOVA 3420 Smart Test Light/Circuit Tester - Image 2](https://m.media-amazon.com/images/I/510Y+tvleES.jpg)
![INNOVA 3420 Smart Test Light/Circuit Tester - Image 3](https://m.media-amazon.com/images/I/51-cqiBSdtS.jpg)

## Questions & Answers

**Q: Can tester SAFELY be used to test ECM signal going to coil and/or injector?**
A: Its current draw is supposed to be about 18mA (green) and 24mA (red), however, the product ships with the following Safety Precautions:
1. For 12V DC systems only. NOT FOR ANY AC VOLT SYSTEM.
2. DO NOT USE THIS TOOL ON COMPUTER CIRCUITRY.
3. DO NOT TEST OR PUNCTURE SPARK PLUG WIRES WITH THIS TOOL.
4. Never use a Test Light to diagnose automotive air bag...

**Q: Is this probe safe enough to test 5V automotive reference wiring? Computer safe?**
A: Hello. To be honest I’m not sure if it will pickup a 5v refurance  I use it
On 12 volt I have a power probe with the 5v connector for it. So I’m not 100 on the test ligh work on that

**Q: Is this an incandescent bulb or an LED bulb??**
A: Led

**Q: Does this tester require a connection to the car battery?**
A: Has two alligator clips to connect to a car battery and a power plug so you can plug it into the power source in the dash. Works on any 12 volt circuit. I use it to fix cars and my electric trains.

## Frequently Bought Together

- Innova 3420 Smart Test Light / Circuit Tester
- Avital 3100LX Security System (W/O Siren)
- Directed Install Essentials 451M Door-Lock Relay Assembly

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-18*