---
product_id: 476039858
title: "TopDiag P100 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Car Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit for Vehicle Trailer Truck Motorcycle Boat"
brand: "topdiag"
price: "A$179"
currency: AUD
in_stock: true
reviews_count: 5
category: "Top Diag"
url: https://www.desertcart.com.au/products/476039858-topdiag-p100-automotive-circuit-tester-12v-24v-power-circuit-probe
store_origin: AU
region: Australia
---

# AC/DC Testing 20Ft Cable Max Voltage: 70V TopDiag P100 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Car Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit for Vehicle Trailer Truck Motorcycle Boat

**Brand:** topdiag
**Price:** A$179
**Availability:** ✅ In Stock

## Summary

> 🔧 Power Up Your Diagnostics with Precision!

## Quick Answers

- **What is this?** TopDiag P100 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Car Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit for Vehicle Trailer Truck Motorcycle Boat by topdiag
- **How much does it cost?** A$179 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/476039858-topdiag-p100-automotive-circuit-tester-12v-24v-power-circuit-probe)

## 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

- • **🌱 Eco-Friendly:** Constructed with environmentally safe materials, low power consumption.
- • **🔒 Safety First:** Built-in circuit breaker ensures safe operation for all users.
- • **🌍 Multi-Functional:** Versatile tool for various applications: from car fuses to continuity testing.
- • **🔍 Easy Diagnostics:** Navigate effortlessly through user-friendly menus for quick readings.
- • **📈 Professional Grade:** Designed for both beginners and pros, ensuring reliable performance.

## Overview

The TopDiag P100 Automotive Circuit Tester is a versatile and user-friendly tool designed for diagnosing a wide range of automotive electrical issues. With a maximum operating voltage of 70V and a 20Ft extension cable, it allows for easy access and testing in various environments. This battery-powered device is perfect for both professionals and DIY enthusiasts, ensuring safety and efficiency in every use.

## Description

1. Voltage and polarity test-quickly determine DC/AC voltage and positive/negative. 2. Resistance continuity test-LCD screen displays the resistance value. 3. AC circuit signal test-quickly solve the sensor circuit problem. 4. The activation of the component in your hands, on the vehicle or on the ground. 5. Testing trailer lights and connecting 10M extension cables allows you to test cars or trucks. 6. Check for bad grounding and find short circuit

Review: Works well and saved me a lot oftime
Review: good for looking shorts or relays not working.

## Features

- The Main Function : The P100 Power Circuit Probe Kit is mainly used to test car battery voltage, AC and DC voltage test, resistance, leakage, short circuit, component activation overload protection and other car circuit system problems. Auto circuit tester with large battery clip, can carry more load. Support wide input voltage range from 9V to 70V, also support 12V cars and 24V trucks.
- Working Modes & Easy to Diagnose : Easy to navigate user menu allows reading DC Voltage, AC voltage, Resistance and Diode parameters very clear. A quick self-testing is a must before to test a circuit or component, ensure your tool is in excellent condition.
- Features : The automotive circuit tester with 20Ft extension cable, environmental protection material, Not pungent.low power consumption, high performance. Durable and Safety - An auto circuit breaker makes this tool very safe and sustainable ,even a beginner can easily use this automotive diagnostic test tool without the manual.
- Widely Applicable . Wide range applications,professional diagnosis, support Multi-languages.The P100 Automotive Circuit Tester can be used as electrical tester, breaker finder, power tester, wire tester, car fuse tester, continuity tester, Short Finder, automotive multimeter, etc..
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | topdiag |
| Part number | TopDiag |
| Item Weight | 862 g |
| Product Dimensions | 15.24 x 6.1 x 3.05 cm; 861.83 g |
| Item model number | P100 |
| Colour | Black |
| Style | Circuit Testers |
| Material | plastic |
| Power source type | Battery Powered |
| Item Package Quantity | 1 |
| Measurement Accuracy | 0.01 |
| Included components | 1*P100 |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** TopDiag
- **Power source:** Battery Powered
- **Style:** Circuit Testers
- **Colour:** Black
- **Item weight:** 862 g

## Images

![TopDiag P100 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Car Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit for Vehicle Trailer Truck Motorcycle Boat - Image 1](https://m.media-amazon.com/images/I/514AyvKa4rL._SX38_SY50_CR,0,0,38,50_.jpg)
![TopDiag P100 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Car Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit for Vehicle Trailer Truck Motorcycle Boat - Image 2](https://m.media-amazon.com/images/I/51E70W9tVZL._SX38_SY50_CR,0,0,38,50_.jpg)
![TopDiag P100 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Car Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit for Vehicle Trailer Truck Motorcycle Boat - Image 3](https://m.media-amazon.com/images/I/51NP48NZLoL._SX38_SY50_CR,0,0,38,50_.jpg)
![TopDiag P100 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Car Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit for Vehicle Trailer Truck Motorcycle Boat - Image 4](https://m.media-amazon.com/images/I/51bjFcL5mXL._SX38_SY50_CR,0,0,38,50_.jpg)
![TopDiag P100 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Car Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit for Vehicle Trailer Truck Motorcycle Boat - Image 5](https://m.media-amazon.com/images/I/51iB+F6z14L._SX38_SY50_CR,0,0,38,50_.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by G***E on 3 April 2024*

Works well and saved me a lot oftime

### ⭐⭐⭐⭐⭐ Review
*by I***I on 1 August 2020*

good for looking shorts or relays not working.

### ⭐⭐⭐⭐⭐ Review
*by M***R on 2 September 2025*

Muy buen producto cumple con su trabajo

## Frequently Bought Together

- Circuit Tester Automotive, Power Circuit Probe Tester, Circuit Breaker Finder, Test Light Automotive with 40FT Cable, Car Fuse Tester, AC DC 12V 24V Car Diagnostic Tool, Topdiag P100
- 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
- JOREST 300Pcs Car Fuse Assortment Kit, 160 Mini Blade Fuses Automotive + 90 Standard Auto Fuses + 50 Micro Fuse + 1 Puller – for Car/RV/Truck/Motorcycle(2Amp 3A 5A 7.5A 10A 15A 20A 25A 30A 35A 40A)

---

## 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.com.au/products/476039858-topdiag-p100-automotive-circuit-tester-12v-24v-power-circuit-probe](https://www.desertcart.com.au/products/476039858-topdiag-p100-automotive-circuit-tester-12v-24v-power-circuit-probe)

---

*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-24*