---
product_id: 732853583
title: "Circuit Breaker Finder Tool, Battery Tester, AC DC Voltage Tester, Fuel Injector Tester, 9V-30V Automotive Circuit Tester with 40FT Cable, P180"
brand: "topdiag"
price: "NT$7886"
currency: TWD
in_stock: true
reviews_count: 13
category: "Top Diag"
url: https://www.desertcart.tw/products/732853583-circuit-breaker-finder-tool-battery-tester-ac-dc-voltage-tester
store_origin: TW
region: Taiwan
---

# AC/DC voltage range -100V to +100V 40FT cable for extended reach 12V battery load & charge test Circuit Breaker Finder Tool, Battery Tester, AC DC Voltage Tester, Fuel Injector Tester, 9V-30V Automotive Circuit Tester with 40FT Cable, P180

**Brand:** topdiag
**Price:** NT$7886
**Availability:** ✅ In Stock

## Summary

> 🔧 Empower your DIY diagnostics — never get caught powerless again!

## Quick Answers

- **What is this?** Circuit Breaker Finder Tool, Battery Tester, AC DC Voltage Tester, Fuel Injector Tester, 9V-30V Automotive Circuit Tester with 40FT Cable, P180 by topdiag
- **How much does it cost?** NT$7886 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/732853583-circuit-breaker-finder-tool-battery-tester-ac-dc-voltage-tester)

## Best For

- topdiag enthusiasts

## Why This Product

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

## Key Features

- • **Built-in Safety & Illumination:** Circuit breaker protection plus dual LED lights ensure safe, accurate troubleshooting even in the darkest garages.
- • **Comprehensive 12V Battery Tester:** Instantly assess battery health, cranking, and charging system performance to avoid unexpected breakdowns.
- • **Precision Circuit Breaker Finder:** Pinpoint open wires and breakpoints with sonic signal tracking for lightning-fast diagnostics.
- • **Ultra-Wide Voltage Compatibility:** Test AC/DC voltages from -100V to +100V plus resistance and diode checks for versatile vehicle diagnostics.
- • **Component Activation & Fuel Injector Testing:** Activate starters, fans, pumps, and test fuel injectors with real-time waveform display on the LCD.

## Overview

The TopDiag P180 is a professional-grade automotive circuit tester designed for 12V-24V vehicles, featuring a 40-foot cable for extended reach. It combines circuit breaker finding, battery load testing, AC/DC voltage measurement, and fuel injector diagnostics in one tool. With built-in safety features and multi-language support, it’s engineered to speed up electrical troubleshooting and component testing for mechanics and vehicle enthusiasts alike.

## Description

Circuit Breaker Finder Tool, Battery Tester, AC DC Voltage Tester, Fuel Injector Tester, 9V-30V Automotive Circuit Tester with 40FT Cable, P180: desertcart.com: Industrial & Scientific

Review: Absolute must-have tool for DIY mechanics and troubleshooting - This 12-volt power probe is a must-have for any do-it-yourself mechanic. I’m still discovering everything it can do, but it has already become one of the most useful tools I own. It’s been especially handy at the junkyard—hook it straight to a battery and you can power electric seats, windows, and locks without tearing anything apart. Being able to test circuits directly makes diagnosing electrical issues much faster. I’ve used it to find shorts, identify broken wires, and quickly power components like locks, radios, and windows to confirm they work. It saves a ton of time compared to traditional test lights or chasing wiring blindly. The tool feels solid, works exactly as advertised, and is incredibly convenient for both troubleshooting and testing. For the price, you really can’t beat it. This is one of those tools you don’t realize you need until you have it—and then you won’t want to work without it. Highly recommended.
Review: Definitely faster and improves your diagnostic capabilities - Good quality works well highly recommend I use it for diagnosing issues in electrical problems on my vehicle vehicles

## Features

- Circuit Breaker Finder Tool: The position of the open conductor can be quickly detected. Plug the tip of the probe into an open wire, send a sonic signal to the wire, and use the TopDiag P181 wire finder to follow the wire from the tip of the probe to find the location of the breakpoint.
- Car Battery Tester: ONLY for 12V Vehicles. It offers quick tests for battery voltage, load test and charge status, along with cranking and charging system tests to assess performance and ensure the reliability of your vehicle. In addition, P180 automotive electrical tools will come with extra 20ft cable, so you can perform diagnosis around the vehicle.
- Ultra-wide Voltage Range & Short Circuit Located: TopDiag P180 test probe supports a series of voltage testing, such as -100V~+100V AC and 0-200V DC voltage detection, resistance test and diode test and other vehicle testing. P180 probe tester automotive also supports track and locate the short circuit, help you troubleshoot faulty components accurately and quickly.
- Component Activation & Fuel Injector Test: Under component activation mode, P180 electrical tester allows to activate different components, such as starter, headlights, blowers, solenoids, cooling fans, fuel pumps, etc. And TopDiag P180 circuit tester can also test the signal of fuel injector, touch the injector with the probe, the current signal waveform will displayed on the LCD screen.
- Jump Lead Function & Circuit Breaker Protection: With jump lead function, Topdiag P180 probe tester can be used to check if there is a fault or problem in the power supply of your vehicle grounding. And P180 electrical circuit tester is built-in circuit breaker protection for the user and vehicle's safety. The working principle of is - the circuit breaker will trip if overload. Equipped with dual LED lights on the top of TopDiag P180 automotive electrical tester, it can light up the dark working area and help users make diagnoses even in the dark.
- Wild Application & Multiple Languages Available: Topdiag P180 circuit tester automotive can be widely use for all 12V-24V vehicle elecrtical system diagnostics, such as cars, motorcycles, excavator, SUV, steamships, etc. P180 power tester supports 10+ languages for vehicle owners: English, Spanish, French, Italian, German, Portuguese, Polish, Korean, Japanese, and more.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0F13FZ7MN |
| Best Sellers Rank | #9,593 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Circuit Testers |
| Brand | TopDiag |
| Color | Red |
| Date First Available | March 11, 2025 |
| Item Weight | 1.76 pounds |
| Item model number | P180 |
| Manufacturer | TopDiag |
| Min. Operating Voltage | 9 Volts |
| Package Dimensions | 9.88 x 8.11 x 3.31 inches |
| Power Source | Corded Electric |
| Specification Met | CE |
| Style | P180 |
| UPC | 794969059291 |

## Product Details

- **Brand:** TopDiag
- **Color:** Red
- **Item Weight:** 0.8 Kilograms
- **Power Source:** Corded Electric
- **Style:** P180

## Images

![Circuit Breaker Finder Tool, Battery Tester, AC DC Voltage Tester, Fuel Injector Tester, 9V-30V Automotive Circuit Tester with 40FT Cable, P180 - Image 1](https://m.media-amazon.com/images/I/71CQ4PwpT6L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Absolute must-have tool for DIY mechanics and troubleshooting
*by E***I on January 5, 2026*

This 12-volt power probe is a must-have for any do-it-yourself mechanic. I’m still discovering everything it can do, but it has already become one of the most useful tools I own. It’s been especially handy at the junkyard—hook it straight to a battery and you can power electric seats, windows, and locks without tearing anything apart. Being able to test circuits directly makes diagnosing electrical issues much faster. I’ve used it to find shorts, identify broken wires, and quickly power components like locks, radios, and windows to confirm they work. It saves a ton of time compared to traditional test lights or chasing wiring blindly. The tool feels solid, works exactly as advertised, and is incredibly convenient for both troubleshooting and testing. For the price, you really can’t beat it. This is one of those tools you don’t realize you need until you have it—and then you won’t want to work without it. Highly recommended.

### ⭐⭐⭐⭐⭐ Definitely faster and improves your diagnostic capabilities
*by B***T on December 26, 2025*

Good quality works well highly recommend I use it for diagnosing issues in electrical problems on my vehicle vehicles

### ⭐⭐⭐⭐⭐ Must have for mechanics
*by A***R on February 6, 2026*

Great tester has everything I needed very high quality and a great value a must have for mechanics

## Frequently Bought Together

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-14*