---
product_id: 69506766
title: "3420 Smart Test Light/Circuit Tester"
price: "NZ$99"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/69506766-3420-smart-test-light-circuit-tester
store_origin: NZ
region: New Zealand
---

# 3420 Smart Test Light/Circuit Tester

**Price:** NZ$99
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 3420 Smart Test Light/Circuit Tester
- **How much does it cost?** NZ$99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/69506766-3420-smart-test-light-circuit-tester)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Innova3420 Smart Test Light/Circuit Tester

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000KIGL6E |
| Best Sellers Rank | #222,377 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #333 in Circuit Testers |
| Brand Name | Innova |
| Color | Clear |
| Compatible Devices | Vehicles (Passenger Cars, Heavy-Duty Trucks) |
| Customer Reviews | 4.5 4.5 out of 5 stars (403) |
| Global Trade Identification Number | 00042173034208 |
| Included Components | Smart Test Light |
| Item Dimensions | 6.5 x 1.75 x 10.25 inches |
| Item Weight | 0.5 Pounds |
| Manufacturer | Innova |
| Measurement Type | Voltmeter |
| Model | 3420 |
| Part Interchange Info | 3420 |
| Part Number | 3420 |
| Power Source | Corded Electric |
| Specification Met | CE, NIST, RoHS, UL |
| Style Name | Smart Test Light |
| UPC | 666669941063 521375004948 031112406015 758353141870 790725488732 042173034208 999990982482 021112418323 421730342084 043994891513 523161038885 077348890945 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 year limited |

## Product Details

- **Brand:** Innova
- **Color:** Clear
- **Item Weight:** 0.5 Pounds
- **Power Source:** Corded Electric
- **Style:** Smart Test Light

## Images

![3420 Smart Test Light/Circuit Tester - Image 1](https://m.media-amazon.com/images/I/71nO3gQZgOS.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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**Shop now:** [https://www.desertcart.nz/products/69506766-3420-smart-test-light-circuit-tester](https://www.desertcart.nz/products/69506766-3420-smart-test-light-circuit-tester)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-04-27*