---
product_id: 541111120
title: "Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable"
brand: "topdiag"
price: "€ 110.78"
currency: EUR
in_stock: true
reviews_count: 12
category: "Top Diag"
url: https://www.desertcart.hr/products/541111120-topdiag-p100-automotive-power-circuit-probe-tester-12-24v-electrical
store_origin: HR
region: Croatia
---

# 40ft total cable length for reach 12-30V wide voltage range Built-in circuit breaker for safety Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable

**Brand:** topdiag
**Price:** € 110.78
**Availability:** ✅ In Stock

## Summary

> ⚡ Diagnose Like a Pro, Drive with Confidence!

## Quick Answers

- **What is this?** Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable by topdiag
- **How much does it cost?** € 110.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/541111120-topdiag-p100-automotive-power-circuit-probe-tester-12-24v-electrical)

## 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

- • **Extended Reach Freedom:** Includes 20ft cable plus 20ft extension—move freely around your vehicle without losing accuracy.
- • **Versatile Voltage Mastery:** Supports 12V & 24V vehicles with 6-30V testing range—perfect for cars, trucks, and boats.
- • **Multilingual Pro Interface:** Operate seamlessly in English, Spanish, German, French, Russian, and more—global-ready for diverse users.
- • **Safety-First Circuit Breaker:** Integrated breaker protects you and your tool from overloads and short circuits—work confidently every time.
- • **Comprehensive Diagnostic Power:** Test AC/DC voltage, resistance, continuity, polarity, and activate components—your all-in-one automotive electrical detective.

## Overview

The Topdiag P100 is a professional-grade automotive power circuit probe tester designed for 12V and 24V vehicles. Featuring a wide 6-30V testing range, built-in circuit breaker for safety, and an extensive 40ft cable setup, it enables precise diagnostics of voltage, resistance, continuity, polarity, and component activation. Multilingual support and robust build make it an essential tool for millennial vehicle owners who demand reliability and efficiency in DIY electrical troubleshooting.

## Description

Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable: desertcart.com: Tools & Home Improvement

Review: Worked exactly as I hoped and then some. Fixed a Diagnosis I was chasing for days! - Absolutely cannot recommend this tool enough. It works exactly as I hoped and has loads of features. Wasn't too hard to figure out. Plenty of cable length so no fear of it being annoying to use. The ground cable is a little short so make sure you've got some testing probes and wires for adjustments. Was chasing a No fuel pump No start condition that was hiding for days. Eventually found the culprit hidden in the Fuel pump assembly that holds the fuel pump together and allows the chassis harness to plug into it. Had a hidden arc damage in the connector on the assembly. This tool ruled it out by simulating power to the pumps making sure they were good but also fully testing the assembly to see if it worked. Solved the mystery and saved me a major headache. Would highly recommend this as it made my life so much easier. Yes it did come with a case too! The P150 model Fuel Pump testing worked flawless and was able to monitor Voltage as well.
Review: This Probe has a scope too! - I was totally shocked and surprised that this Probe had a little "Lab Scope". Using A/C Voltage screen, I got the 'Scope' and Frequency and Duty cycle. It was able to 'see' my ignition coil primary firing! I would not be making a lab scope diagnosis from here, but, this is great for that first 15 minute view into 'What is going on here'? I am looking forward to proving it can 'See' things like Purge valve duty cycle, along with blower motors, fans etc! The other Probe features appear to be very good and normal. Positive and negative tip, circuit breaker, logic probe indicator, continuity, tone, Ohms, etc. Remember,TRIGGER CONTROL! Don't put power or ground to any computer circuit. Those are the really small wires. If you do, you will surely burn up the computer,.... you know....'Let the smoke out'! It is safest to disconnect the particular load from the circuit before trying to power it up and see if it runs, ie: UNPLUG IT! Happy Trails ,

## Features

- Topdiag P100 Power Circuit Probe Tester: Topdiag P100 circuit tester is one of the most versatile automotive electrical tools available on the market. It is designed to test various aspects of your vehicle's electrical system, including AC/DC voltage, resistance, continuity, polarity, and connections. With this probe tester, vehicle owners can easily diagnose electrical issues on their own without the need for professional assistance.
- Circuit Breaker & Safety Design: Our Topdiag P100 Topdiag power probe tester is equipped with a built-in circuit breaker for added safety. This feature ensures that the automotive circuit tester is protected against short circuits and overloads. If the tester detects an overload, the circuit breaker will trip to protect not only the tool but also the user.
- Components Activation Function: This electrical circuit tester also comes with components activation function. It can be used to test various components, such as continuity, ground connection, short circuits, and polarity detection. Before testing any circuit or component, it is recommended to perform a quick self-test to ensure the tester is functioning properly.
- 20ft Extension Cable: Our power circuit tester comes with a durable and safe 20ft extension cable. This allows you to freely move around the vehicle while performing tests. Additionally, the extension cable ensures less deviation and provides more accurate testing data, giving you a better understanding of your vehicle's condition.Support wide input voltage range from 9V to 30V, also support 12V cars and 24V trucks.
- Wide Application: Our P100 power circuit probe test kit has a wide range of applications. It can be used as a car fuse tester, power tester, breaker finder, short finder, and automotive multimeter, among others. It also offers professional diagnostic capabilities and supports multiple languages, making it suitable for various vehicles and user requirements.
- 1-Year Warranty +24 Hours Service:We provide a solid 1-year warranty service and a 60-day no-reason-asked return and exchange guarantee.Our tech support is available 24/7 to quickly resolve quality issues, usually within 24 hours.With worry-free protection throughout the process, you can enjoy a peace-of-mind experience to the fullest.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BZD7PGZR |
| Best Sellers Rank | #47,308 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #81 in Circuit Testers |
| Brand | TopDiag |
| Brand Name | TopDiag |
| Color | Black |
| Compatible Devices | Vehicles with 12V or 24V electrical systems |
| Customer Reviews | 4.6 out of 5 stars 898 Reviews |
| Item Dimensions | 9.84 x 3.35 x 7.48 inches |
| Item dimensions L x W x H | 9.84 x 3.35 x 7.48 inches |
| Manufacturer | Topdiag |
| Measurement Type | Multimeter |
| Min. Operating Voltage | 12 Volts |
| Minimum Operating Voltage | 12 Volts |
| Model | Topdiag P100 |
| Part Number | Topdiag P100 |
| Power Source | Corded Electric |
| Style | P100 |
| Style Name | P100 |
| UPC | 753955453710 |
| Unit Count | 1.00 Count |
| Upper Temperature Rating | 50 Degrees Celsius |

## Product Details

- **Brand:** TopDiag
- **Color:** Black
- **Item dimensions L x W x H:** 9.84 x 3.35 x 7.48 inches
- **Power Source:** Corded Electric
- **Style:** P100

## Images

![Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable - Image 1](https://m.media-amazon.com/images/I/7101T9G9SDL.jpg)
![Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable - Image 2](https://m.media-amazon.com/images/I/71dgDcgNFHL.jpg)
![Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable - Image 3](https://m.media-amazon.com/images/I/71ZkynUE52L.jpg)
![Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable - Image 4](https://m.media-amazon.com/images/I/713+X0Lj3qL.jpg)
![Topdiag P100 Automotive Power Circuit Probe Tester, 12 24V Electrical Short/Open Breaker Finder, AC DC Diode Resistance Relay Tester, Continuity Test Digital Multimeter/Ohmmeters, 20 + 20FT Cable - Image 5](https://m.media-amazon.com/images/I/71LjQ+PA62L.jpg)

## Available Options

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

## Questions & Answers

**Q: What is the voltage range for the TopDiag P100 Power Circuit Probe Kit?**
A: This kit is primarily designed for 12V/24V power supplies and is also compatible with vehicle electrical systems operating between 6V and 30V. It covers testing requirements for various vehicle types, including 12V passenger cars and 24V trucks.

**Q: What core testing functions does the TopDiag P100 offer?**
A: It features a comprehensive suite of core testing functions, including AC/DC voltage testing, resistance testing, continuity testing, polarity detection, short circuit detection, ground connection testing, and trailer light testing.

**Q: Does this kit support multiple languages? Which languages are included?**
A: Yes, it supports multiple languages, including English, Spanish, Italian, Portuguese, German, French, Russian, Chinese, and more, making it easy for users with different language backgrounds to operate.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked exactly as I hoped and then some. Fixed a Diagnosis I was chasing for days!
*by A***A on August 27, 2024*

Absolutely cannot recommend this tool enough. It works exactly as I hoped and has loads of features. Wasn't too hard to figure out. Plenty of cable length so no fear of it being annoying to use. The ground cable is a little short so make sure you've got some testing probes and wires for adjustments. Was chasing a No fuel pump No start condition that was hiding for days. Eventually found the culprit hidden in the Fuel pump assembly that holds the fuel pump together and allows the chassis harness to plug into it. Had a hidden arc damage in the connector on the assembly. This tool ruled it out by simulating power to the pumps making sure they were good but also fully testing the assembly to see if it worked. Solved the mystery and saved me a major headache. Would highly recommend this as it made my life so much easier. Yes it did come with a case too! The P150 model Fuel Pump testing worked flawless and was able to monitor Voltage as well.

### ⭐⭐⭐⭐⭐ This Probe has a scope too!
*by D***E on April 13, 2025*

I was totally shocked and surprised that this Probe had a little "Lab Scope". Using A/C Voltage screen, I got the 'Scope' and Frequency and Duty cycle. It was able to 'see' my ignition coil primary firing! I would not be making a lab scope diagnosis from here, but, this is great for that first 15 minute view into 'What is going on here'? I am looking forward to proving it can 'See' things like Purge valve duty cycle, along with blower motors, fans etc! The other Probe features appear to be very good and normal. Positive and negative tip, circuit breaker, logic probe indicator, continuity, tone, Ohms, etc. Remember,TRIGGER CONTROL! Don't put power or ground to any computer circuit. Those are the really small wires. If you do, you will surely burn up the computer,.... you know....'Let the smoke out'! It is safest to disconnect the particular load from the circuit before trying to power it up and see if it runs, ie: UNPLUG IT! Happy Trails ,

### ⭐⭐⭐⭐⭐ Probe
*by M***N on February 9, 2026*

Great tool with out spending a lot of money in the original brand highly recommended

## Frequently Bought Together

- Power Circuit Probe Kit, P100 Car Circuit Tester, 12V 24V Automotive Electrical Tool, 6-30V Vehicle Short Circuit Finder with 40ft Cable, Trailer Truck Voltage Current Detector
- JOREST 300Pcs Car Fuse Assortment Kit, 160 Mini Blade Fuses Automotive + 90 Standard Auto Fuses + 50 Micro + Puller – Replacement for RV Camper Boat Truck (2Amp 3A 5A 7.5A 10A 15A 20A 25A 30A 35A 40A)
- WINAMOO Automotive Test Light with 3-48V LED Digital Voltage Display, Auto Circuit Tester with Voltmeter & Dual Color Polarity Indicate, Electric Test Pen w/Stainless Probe for Car/Truck/SUV Checker

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hr/products/541111120-topdiag-p100-automotive-power-circuit-probe-tester-12-24v-electrical](https://www.desertcart.hr/products/541111120-topdiag-p100-automotive-power-circuit-probe-tester-12-24v-electrical)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-06-20*