---
product_id: 344038294
title: "Otc 3642 Truck Electrical Circuit Tester - 12V-24V With 24 Foot Cord"
brand: "otc"
price: "5 zł"
currency: PLN
in_stock: true
reviews_count: 5
url: https://www.desertcart.pl/products/344038294-otc-3642-truck-electrical-circuit-tester-12v-24v-with-24
store_origin: PL
region: Poland
---

# 24-foot expandable cord 12V-24V versatile testing 7-inch stainless steel probe Otc 3642 Truck Electrical Circuit Tester - 12V-24V With 24 Foot Cord

**Brand:** otc
**Price:** 5 zł
**Availability:** ✅ In Stock

## Summary

> 🚛 Power up your diagnostics with reach and precision!

## Quick Answers

- **What is this?** Otc 3642 Truck Electrical Circuit Tester - 12V-24V With 24 Foot Cord by otc
- **How much does it cost?** 5 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/344038294-otc-3642-truck-electrical-circuit-tester-12v-24v-with-24)

## Best For

- otc enthusiasts

## Why This Product

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

## Key Features

- • **Heavy-Duty Clamp:** Extra-large clamp grips bigger nuts and bolts, outperforming standard testers.
- • **Precision Probing:** 7-inch stainless steel probe delivers pinpoint accuracy in locating shorts and grounds.
- • **Compact Yet Mighty:** Coiled cord stays neat and compact until you need maximum reach—perfect for on-the-go pros.
- • **Power Range Mastery:** Effortlessly tests 12V to 24V systems for all your truck diagnostics.
- • **Reach Without Limits:** Stretch the vibrant red coiled cord up to 24 feet—access hard-to-reach circuits with ease.

## Overview

The OTC 3642 Truck Electrical Circuit Tester is a professional-grade tool designed for 12V to 24V truck electrical systems. Featuring a durable 7-inch stainless steel probe and an extra-large clamp, it excels at identifying shorts, grounds, and open circuits. Its standout 24-foot expandable red coiled cord ensures you can access even the most challenging spots, making it an essential companion for any serious truck technician.

## Description

Full description not available

## Features

- OTCs Truck Circuit Tester is designed for testing electrical circuits and locating shorts, grounds, and open circuits
- For use on 12V - 24V systems
- Features a 7 inch long stainless steel probe
- Red coiled cord stays compact until you need more length then has the capability of stretching to a full 24 feet
- Extra large clamp can be attached to larger nuts, bolts, and other grounds than a typical smaller clamp

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | OTC |
| Brand | OTC |
| Model | 3642 |
| Product Dimensions | 35.31 x 5.33 x 0.25 cm; 1 g |
| Item model number | 3642 |
| Manufacturer Part Number | 3642 |
| OEM Part Number | 3642 |
| Item Weight | 1 g |

## Product Details

- **Brand:** OTC
- **Power source:** Corded Electric
- **Style:** Modern
- **Colour:** Red
- **Item weight:** 1 Grams

## Images

![Otc 3642 Truck Electrical Circuit Tester - 12V-24V With 24 Foot Cord - Image 1](https://m.media-amazon.com/images/I/51ChZMSwn-L.jpg)
![Otc 3642 Truck Electrical Circuit Tester - 12V-24V With 24 Foot Cord - Image 2](https://m.media-amazon.com/images/I/71qRZBgWfaL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Quality test light
  

*by D***. on Reviewed in the United States on 13 August 2022*

Great way to add a light load so your multi meter will read loaded voltage and not lie to you. Longer wire is also nice. From back of the dump truck to the cab! Overall great product.

### ⭐⭐⭐⭐⭐ 







  
  
    Draws 60 mA under 12.5V, drops out at 5V
  

*by D***E on Reviewed in Canada on 10 April 2022*

This is a professional grade test light that draws 60mA at 12.5V, so it has more dynamic resistance compared to the older 3636 OTC tool that draws 150mA. Interestingly the higher resistance is mostly from the replaceable white incandescent bulb, and the new 3642 bulb is the same size (27mm long) and interchangeable with the older classic 3633 red bulb. So if you want more current you can swap in an old bulb. I'll guess the new bulb is likely more robust simply because it draws a lot less power so won't get as hot. I did a 1 min review of how this test light performs on a variable power supply, titled "a tradesman knows his tools", or search OTC 3642. Overall I'd call this a winner, there is a smooth drop in brightness as voltage falls, becoming almost unnoticeable at 5 volts. Clamp is robust and the whole thing has pro level quality. Cord stretches to 24 feet.

### ⭐⭐⭐⭐⭐ 







  
  
    I'm satisfied with my purchase
  

*by E***C on Reviewed in Canada on 17 September 2020*

Nothing negative to report. Works as intended

## Frequently Bought Together

- OTC 3642 Truck Electrical Circuit Tester - 12V-24V with 24 Foot Cord,Red
- OTC 3634 Heavy-Duty Straight Cord Circuit Tester, Red
- OTC 3633-10 Replacement Bulb, (Pack of 10)

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**Shop now:** [https://www.desertcart.pl/products/344038294-otc-3642-truck-electrical-circuit-tester-12v-24v-with-24](https://www.desertcart.pl/products/344038294-otc-3642-truck-electrical-circuit-tester-12v-24v-with-24)

---

*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-02-02*