--- product_id: 403485808 title: "3634 Heavy-Duty Straight Cord Circuit Tester" brand: "otc" price: "€ 73.42" currency: EUR in_stock: true reviews_count: 5 category: "Otc" url: https://www.desertcart.sk/products/403485808-3634-heavy-duty-straight-cord-circuit-tester store_origin: SK region: Slovakia --- # Bright replaceable red bulb Tests 6 & 12V systems Heavy-duty 12ft coiled cord 3634 Heavy-Duty Straight Cord Circuit Tester **Brand:** otc **Price:** € 73.42 **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?** € 73.42 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/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 Heavy-Duty Straight Cord Circuit Tester is designed for testing electrical circuits and locating shorts, grounds, and open circuits. The features include a 12 foot heavy-duty coiled cord. It checks 6 and 12 volt systems. It has an ergonomic, slim-designed, clear handle. It has a bright red, slim style replaceable bulb. It has a heavy-duty stainless steel probe with insulated shaft and heavy-duty clip with positive soldered connection. Review: Heavy duty make. Long thick flexible cord. - Feels sturdy in hand. Cable is higher quality. Definitely would buy again. Review: Nice as expected - Nice quality, even has a nice reusable plastic box for storage when not in use. Basic tool, but not cheap wire or clamp. Worth the extra $$$ ## 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 | |---------------|-------| | ASIN | B002YKHCOQ | | Best Sellers Rank | #26,460 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #28 in Circuit Testers | | Brand | OTC | | Brand Name | OTC | | Color | red | | Colour | red | | Customer Reviews | 4.8 out of 5 stars 434 Reviews | | Global Trade Identification Number | 00731413505775 | | Included Components | Product & Instructions Guide | | Item Dimensions | 8.5 x 24.3 x 4.4 centimeters | | Item Type Name | OTC 3634 Heavy-Duty Straight Cord Circuit Tester, Red | | Item Weight | 1 Grams | | Item dimensions L x W x H | 8.5 x 24.3 x 4.4 centimeters | | Item weight | 1 Grams | | Manufacturer | OTC | | Maximum Operating Voltage | 12 Volts | | Measurement Type | Voltmeter | | Minimum Operating Voltage | 6 Volts (DC) | | Model | 3634 | | Number of Items | 1 | | Part Number | 3634 | | Power Source | Corded Electric | | Power source | Corded Electric | | Specification Met | UL | | Style | Handheld | | Style Name | Handheld | | UPC | 731413505775 | | Unit Count | 2305 Count | ## 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Heavy duty make. Long thick flexible cord. *by A***R on 3 November 2024* Feels sturdy in hand. Cable is higher quality. Definitely would buy again. ### ⭐⭐⭐⭐⭐ Nice as expected *by D***H on 10 February 2025* Nice quality, even has a nice reusable plastic box for storage when not in use. Basic tool, but not cheap wire or clamp. Worth the extra $$$ ### ⭐⭐⭐⭐⭐ It's a very nice test light *by S***A on 16 May 2025* Very nice and well made test light. The cable is high quality, the kind that stays flexable in very cold weather. ## 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.sk/products/403485808-3634-heavy-duty-straight-cord-circuit-tester](https://www.desertcart.sk/products/403485808-3634-heavy-duty-straight-cord-circuit-tester) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-09*