---
product_id: 738125208
title: "Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing"
brand: "feaoxyo"
price: "149 kr"
currency: DKK
in_stock: true
reviews_count: 8
category: "Feaoxyo"
url: https://www.desertcart.dk/products/738125208-heavy-duty-automotive-circuit-tester-5-90v-test-light-digital
store_origin: DK
region: Denmark
---

# 5-90V range, precise 0.1V resolution 96-inch flexible spring coil wire Dual-color polarity indicator Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing

**Brand:** feaoxyo
**Price:** 149 kr
**Availability:** ✅ In Stock

## Summary

> 🔧 Power up your precision—test smarter, not harder!

## Quick Answers

- **What is this?** Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing by feaoxyo
- **How much does it cost?** 149 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/738125208-heavy-duty-automotive-circuit-tester-5-90v-test-light-digital)

## Best For

- feaoxyo enthusiasts

## Why This Product

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

## Key Features

- • **Reach Every Circuit:** Extra-long 96-inch flexible coil wire lets you effortlessly access tight or hidden automotive, RV, or boat electrical spots from a single ground point.
- • **Built for the Real World:** Rugged ABS body and stainless steel probe resist drops, grease, and impact—designed to survive the busiest professional garages and DIY workshops.
- • **Instant Polarity Clarity:** Dual-color LED indicators (red for positive, green for negative) illuminate immediately to prevent costly wiring mistakes and protect sensitive electronics.
- • **Pinpoint Voltage Accuracy:** Crystal-clear LED display delivers exact readings from 5 to 90 volts with 0.1V precision—never second guess your diagnostics again.
- • **Versatile Automotive Essential:** Perfect for 12V/24V systems—test fuses, trace wires, verify connectors, and troubleshoot circuits across cars, trucks, RVs, and boats with confidence.

## Overview

The FEAOXYO Heavy Duty Automotive Circuit Tester is a professional-grade digital voltmeter and test light designed for automotive, RV, and marine electrical diagnostics. Featuring a 5-90V measurement range with 0.1V resolution, dual-color polarity indicators, and a durable stainless steel probe, it ensures accurate, safe, and efficient troubleshooting. Its rugged ABS housing and 96-inch flexible coil wire make it ideal for demanding workshop environments and hard-to-reach circuits, making it an indispensable tool for both professional technicians and savvy DIYers.

## Description

FEAOXYO Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing: desertcart.com: Tools & Home Improvement

Review: First tester faulty Replacement is accurate (Read Edit)! - I really wanted to like this tool. It looks very nice and well made except the reading for voltage is off! I like the reading for polarity, (I’d rather the green light be on for correct polarity) and the cord with probe cap is works well. The biggest problem is the voltage reading is not accurate. On a 12 volt car battery I get a reading of over 16 volts. So basically this for me is only a test light for continuity that will also let me know if polarity is correct. Review Edit. Seller offered me a refund right away. But since I don’t check my emails very often I didn’t see offer for around 2 months. I contacted seller to see if offer was still good. The seller refunded my money so I purchased another circuit testers. This second tester works excellent, I checked a battery that I had just charged it showed 13.1 volts. I checked the battery in my car it showed 12.3 volts. This tester appears to be accurate as the voltage numbers are within what I expected. I tested batteries with a meter and the voltages are within 0.2 between meter and test light. I would buy again from this seller as I’m very pleased with their after sale service.
Review: Great inexpensive tester - This is a great tester getting just a little light showing up it actually shows you the voltage of what your testing. It is simple and easy to use. I really like this small convenient tester.

## Features

- INSTANT AND ACCURATE VOLTAGE READINGS: This professional digital test light with voltmeter features a crystal-clear digital LED screen that delivers pinpoint voltage measurements from 5-90V with 0.1V resolution. Making it the perfect voltage tester for any automotive electrical work and systems, ideal for professional technicians and DIYers alike
- AVOID COSTLY CONNECTION ERRORS: Stay safe and protect sensitive vehicle electronics with the intuitive dual-color polarity lights, red for positive (+) and green for negative (-)—that illuminate instantly when the stainless steel probe touches a circuit. Taking the risk out of electrical work, making it a must-have for garage safety
- BUILT TO SURVIVE THE BUSY WORKSHOPS: This electrical tester boasts a rugged ABS body that resists drops, grease and impact, ideal for the chaos of garages or DIY home projects. The sharp stainless steel probe penetrates tight spaces and maintains solid contact, while the reinforced construction ensures long-lasting performance even with daily use
- FLEXIBLE TO REACH EVERY SPOT: Effortlessly diagnose hard-to-reach areas with the extra-long, 96-inch flexible spring coil wire. It allows you to easily access any part of your car, truck, or motorcycle from a single ground point. Plus, the integrated anti-lost probe cover keeps your tool protected and easy to find
- VERSATILE FOR YOUR NEEDS: This all-in-one automotive circuit tester is ideal for 12V/24V systems. Perfect for checking fuses, verifying voltage at connectors, testing circuits, and tracing wires on your car, truck, RV, boat, and more. Making it an essential tool for consistent quality in your daily electrical troubleshooting

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0F2MLGK6Q |
| Best Sellers Rank | #8,399 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Circuit Testers |
| Brand | FEAOXYO |
| Color | Red/Metallic |
| Date First Available | March 27, 2025 |
| Item Weight | 4.2 ounces |
| Manufacturer | FEAOXYO |
| Maximum Operating Voltage | 90 Volts |
| Measurement Type | Voltmeter |
| Min. Operating Voltage | 5 Volts |
| Package Dimensions | 10.79 x 4.61 x 1.34 inches |
| Power Source | Corded Electric |
| UPC | 649226718155 |

## Product Details

- **Brand:** FEAOXYO
- **Color:** Red/Metallic
- **Measurement Type:** Voltmeter
- **Min. Operating Voltage:** 5 Volts
- **Power Source:** Corded Electric

## Images

![Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing - Image 1](https://m.media-amazon.com/images/I/41+Iw3nrfML.jpg)
![Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing - Image 2](https://m.media-amazon.com/images/I/41JLcWlIcZL.jpg)
![Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing - Image 3](https://m.media-amazon.com/images/I/41TJndicqZL.jpg)
![Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing - Image 4](https://m.media-amazon.com/images/I/41anfarQt8L.jpg)
![Heavy Duty Automotive Circuit Tester 5-90V Test Light, Digital LED Voltage Tester with Voltmeter, Dual Polarity Indicator & Stainless Probe for Car, Truck, RV, Boat Electrical Fuse Testing - Image 5](https://m.media-amazon.com/images/I/41hIxmp-cGL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ First tester faulty Replacement is accurate (Read Edit)!
*by S***R on October 27, 2025*

I really wanted to like this tool. It looks very nice and well made except the reading for voltage is off! I like the reading for polarity, (I’d rather the green light be on for correct polarity) and the cord with probe cap is works well. The biggest problem is the voltage reading is not accurate. On a 12 volt car battery I get a reading of over 16 volts. So basically this for me is only a test light for continuity that will also let me know if polarity is correct. Review Edit. Seller offered me a refund right away. But since I don’t check my emails very often I didn’t see offer for around 2 months. I contacted seller to see if offer was still good. The seller refunded my money so I purchased another circuit testers. This second tester works excellent, I checked a battery that I had just charged it showed 13.1 volts. I checked the battery in my car it showed 12.3 volts. This tester appears to be accurate as the voltage numbers are within what I expected. I tested batteries with a meter and the voltages are within 0.2 between meter and test light. I would buy again from this seller as I’m very pleased with their after sale service.

### ⭐⭐⭐⭐⭐ Great inexpensive tester
*by L***W on January 10, 2026*

This is a great tester getting just a little light showing up it actually shows you the voltage of what your testing. It is simple and easy to use. I really like this small convenient tester.

### ⭐⭐⭐⭐⭐ Very good tester
*by D***. on October 21, 2025*

This LED testlight worked well for me. I used it while installing a lighter plug and also when I was looking for a blown fuse in my truck. Very easy to see the readout, and to green light helped me greatly. Seems durable - I dropped it onto my concrete driveway without damage. I wish there green {Hot} light was a little brighter. Regardless.. a good tester at a great price.

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-25*