---
product_id: 284283779
title: "3420 Smart Test Light/Circuit Tester"
brand: "innova"
price: "KSh6318"
currency: KES
in_stock: true
url: https://www.desertcart.co.ke/products/284283779-3420-smart-test-light-circuit-tester
store_origin: KE
region: Kenya
---

# Transparent handle with tri-color LED indicators 6-foot leads for extended reach Ergonomic grip for safe, comfortable use 3420 Smart Test Light/Circuit Tester

**Brand:** innova
**Price:** KSh6318
**Availability:** ✅ In Stock

## Summary

> 🔧 Illuminate your diagnostics with smart precision and effortless reach!

## Quick Answers

- **What is this?** 3420 Smart Test Light/Circuit Tester by innova
- **How much does it cost?** KSh6318 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/284283779-3420-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

- • **Plug & Play Power:** Connects effortlessly via cigarette lighter or alligator clamps for versatile testing
- • **Safety Meets Comfort:** Ergonomic grip design ensures secure handling during every diagnostic session
- • **Instant Visual Clarity:** Tri-color LEDs (White, Red, Green) instantly decode voltage and ground status
- • **Precision You Can Trust:** Accurate voltage detection with ±0.5 measurement precision for professional-grade results
- • **Extended Reach, No Limits:** 6-foot leads let you test hard-to-reach circuits with ease

## Overview

The Innova 3420 Smart Test Light is a professional-grade circuit tester designed for safe, accurate voltage and ground detection across multiple automotive and electronic systems. Featuring 6-foot leads, a transparent handle with bright tri-color LEDs, and an ergonomic grip, it offers extended reach, instant visual feedback, and comfortable handling. Powered via cigarette lighter or alligator clamps, it delivers reliable diagnostics with ±0.5 accuracy, making it an essential tool for any tech-savvy professional.

## Description

3420 Smart Test Light/Circuit Tester

## Features

- Designed to safely check voltage and/or ground on several electronic systems
- Connects using a cigarette lighter / power plug and detachable twin alligator clamps
- 6-foot leads provide long reach connection
- Unique transparent handle shows bright LEDs to identify connections (White = Proper Connection to Source, Red = Voltage Present and Green = Ground Present)
- Features ergonomic grip design for comfort and safety

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Innova |
| Part number | 3420 |
| Item Weight | 227 g |
| Product Dimensions | 16.51 x 4.45 x 26.04 cm; 226.8 g |
| Batteries | 3 AA batteries required. |
| Item model number | 3420 |
| Color | Clear |
| Style | Smart Test Light |
| Power source type | Corded Electric |
| Item Package Quantity | 1 |
| Measurement Accuracy | +/- 0.5 |
| Specification met | REACH |
| Included components | Smart Test Light |
| Batteries Included? | No |
| Batteries Required? | Yes |

## Product Details

- **Brand:** Innova
- **Power source:** Corded Electric
- **Style:** Smart Test Light
- **Colour:** Clear
- **Item weight:** 227 g

## Images

![3420 Smart Test Light/Circuit Tester - Image 1](https://m.media-amazon.com/images/I/71nO3gQZgOS.jpg)

## Available Options

This product comes in different **Style** options.

## 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 Kenya*
*Store origin: KE*
*Last updated: 2026-02-18*