---
product_id: 403485808
title: "3634 Heavy-Duty Straight Cord Circuit Tester"
brand: "otc"
price: "฿3393"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/403485808-3634-heavy-duty-straight-cord-circuit-tester
store_origin: TH
region: Thailand
---

# Bright replaceable red bulb Tests 6 & 12V systems Heavy-duty 12ft coiled cord 3634 Heavy-Duty Straight Cord Circuit Tester

**Brand:** otc
**Price:** ฿3393
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay powered up with precision – test smarter, not harder!

## Quick Answers

- **What is this?** 3634 Heavy-Duty Straight Cord Circuit Tester by otc
- **How much does it cost?** ฿3393 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/403485808-3634-heavy-duty-straight-cord-circuit-tester)

## 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

- • **Ergonomic Clear Handle:** Slim, transparent design ensures comfortable grip and easy visibility.
- • **Durable Heavy-Duty Cord:** 12-foot coiled cord offers flexibility and longevity on any job site.
- • **Dual Voltage Compatibility:** Seamlessly tests both 6V and 12V electrical systems for versatile use.
- • **Precision Circuit Diagnosis:** Pinpoint shorts, grounds, and open circuits with ease.
- • **Reliable Contact & Illumination:** Positive soldered connections paired with a bright replaceable bulb for flawless testing.

## Overview

The OTC 3634 Heavy-Duty Straight Cord Circuit Tester is a professional-grade electrical tool designed to quickly identify shorts, grounds, and open circuits in 6V and 12V systems. Featuring a durable 12-foot coiled cord, ergonomic clear handle, and a bright replaceable red bulb, it delivers reliable, precise diagnostics for electricians and technicians who demand efficiency and durability.

## Description

OTC 3634 Heavy-Duty Straight Cord Circuit Tester

## Features

- Designed for testing electrical circuits and locating shorts grounds and open circuits
- Features include 5 foot heavy-duty cord and checks both 6 and 12 volt systems
- Ergonomic slim designed clear handle with a bright red slim style replaceable bulb
- Positive contact-molded strain relief

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | OTC |
| Brand | OTC |
| Model | 3634 |
| Product Dimensions | 8.51 x 24.26 x 4.45 cm; 1 g |
| Item model number | 3634 |
| Manufacturer Part Number | 3634 |
| Voltage | 12 Volts |
| Item Weight | 1 g |

## Product Details

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

## Images

![3634 Heavy-Duty Straight Cord Circuit Tester - Image 1](https://m.media-amazon.com/images/I/61g1sP6Lr4L.jpg)

## Questions & Answers

**Q: Is the led bipolar ? I.e. does this work using the clamp on a positive power source to check for negative power with the probe?**
A: It’s not Led, incandescent bulb.

**Q: Does anyone know what’s amperage this test light draws?**
A: I measure 151 mA with a Fluke 87-V.

**Q: Is there a way to put a white light in this one and get rid of the red one?**
A: Not without modifications or using a small low wat incandescent

**Q: What is the actual length and type of cord? Description says 12 foot coiled cord, then it says 5 foot straight cord...? Which is it?**
A: 5 foot heavy duty cord.

## Frequently Bought Together

- OTC 3634 Heavy-Duty Straight Cord Circuit Tester, Red
- OTC 3633-10 Replacement Bulb, (Pack of 10)
- Premium LED Bulb Automotive Circuit Tester, 6-24V Test Light with 135 Inch PU Extended Spring Wire, Sharp Hard Steel Probe Vehicle Circuits Low DC Voltage Light Tester

---

## 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.co.th/products/403485808-3634-heavy-duty-straight-cord-circuit-tester](https://www.desertcart.co.th/products/403485808-3634-heavy-duty-straight-cord-circuit-tester)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-27*