---
product_id: 741294343
title: "TopDiag P50 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Automotive Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit (P50)"
brand: "topdiag"
price: "A$91"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/741294343-topdiag-p50-automotive-circuit-tester-12v-24v-power-circuit-probe
store_origin: AU
region: Australia
---

# 12V/24V dual voltage compatibility 5W valve load for real-time circuit load testing LED polarity indicator for instant positive/negative detection TopDiag P50 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Automotive Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit (P50)

**Brand:** topdiag
**Price:** A$91
**Availability:** ✅ In Stock

## Summary

> 🔧 Diagnose like a pro, avoid costly downtime!

## Quick Answers

- **What is this?** TopDiag P50 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Automotive Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit (P50) by topdiag
- **How much does it cost?** A$91 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/741294343-topdiag-p50-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

- • **Dual Voltage Mastery:** Seamlessly test both 12V and 24V automotive circuits without switching tools.
- • **Compact & Lightweight:** At just 100g and pocket-sized, carry professional-grade diagnostics wherever you go.
- • **Real-Time Load Simulation:** Use the integrated 5W valve load to instantly spot hidden circuit failures through bulb brightness.
- • **Instant Polarity Recognition:** Red and blue LEDs clearly identify positive and negative power sources, eliminating guesswork.
- • **Precision Voltage Measurement:** Combines voltage meter and load bulb brightness for pinpoint diagnostics every time.

## Overview

The TopDiag P50 is a compact, lightweight automotive circuit tester designed for 12V and 24V systems. Featuring a 5W valve load for accurate load simulation and LED polarity indicators, it enables quick and precise electrical diagnostics, helping professionals identify hidden circuit faults and voltage issues efficiently.

## Description

Full description not available

## Features

- Voltage measurement function: The voltage measurement function is used in the same way as the measurement of a multimeter
- Valve load measurement: Uses a 5W car valve as a load. Through the bulb brightness, you can quickly determine the electrical power failure. Compared to diode testers, it can display hidden failures such as circuit contact failure or excessive resistance
- Valve load voltage measurement: It measures the bulb brightness of the electrical pen, and is linked with the voltage meter function of the electric pen, allowing for a more accurate voltage measurement. This improves the ability to diagnostic malfunction
- The load plug uses a probe connected directly to the clip and can be used in conjunction with the probe of the electrical test pen to perform a direct load simulation measurement. It is useful for diagnosis malfunction
- Voltage Pole Display Function: Quickly distinguish positive and negative power source via red and blue LEDs. Voltage polarity display function: Quickly distinguish positive and negative power source via red and blue LEDs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | JDiag Electronics Technology Co.,Ltd |
| Brand | TopDiag |
| Product Dimensions | 12.4 x 3.48 x 4.95 cm; 100 g |
| Item model number | b7689669-1ce3-499d-8cd6-c04e9008b181 |
| Item Dimensions  L x W x H | 12.4 x 3.5 x 5 cm |
| Warranty | Warranty Period: 45 Days |
| Item Weight | 100 g |

## Product Details

- **Brand:** TopDiag
- **Item Weight:** 0.1 Kilograms
- **Item dimensions L x W x H:** 12.4 x 3.5 x 5 cm
- **Manufacturer:** JDiag Electronics Technology Co.,Ltd

## Images

![TopDiag P50 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Automotive Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit (P50) - Image 1](https://m.media-amazon.com/images/I/61i73-nw3mL.jpg)
![TopDiag P50 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Automotive Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit (P50) - Image 2](https://m.media-amazon.com/images/I/71AQ8H5m74L.jpg)
![TopDiag P50 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Automotive Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit (P50) - Image 3](https://m.media-amazon.com/images/I/71ieqti-J4L.jpg)
![TopDiag P50 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Automotive Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit (P50) - Image 4](https://m.media-amazon.com/images/I/71f36hyrTvL.jpg)
![TopDiag P50 Automotive Circuit Tester 12V 24V Power Circuit Probe Tester, Automotive Electrical Test Tool Kit AC DC Digital Voltage Tester, Auto Diagnostic Kit (P50) - Image 5](https://m.media-amazon.com/images/I/61D58J5lv9L.jpg)

## Available Options

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

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**Shop now:** [https://www.desertcart.com.au/products/741294343-topdiag-p50-automotive-circuit-tester-12v-24v-power-circuit-probe](https://www.desertcart.com.au/products/741294343-topdiag-p50-automotive-circuit-tester-12v-24v-power-circuit-probe)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-01-26*