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?

It’s not Led, incandescent bulb.

Does anyone know what’s amperage this test light draws?

I measure 151 mA with a Fluke 87-V.

Is there a way to put a white light in this one and get rid of the red one?

Not without modifications or using a small low wat incandescent

Otc 3634 Heavy Duty Straight Cord Circuit Tester

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

45753CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

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Description

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

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.

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.

Specifications

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

Reviews

A**R

Heavy duty make. Long thick flexible cord.

Feels sturdy in hand. Cable is higher quality. Definitely would buy again.

3.11.2024

D**H

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 $$$

10.02.2025

S**A

It's a very nice test light

Very nice and well made test light. The cable is high quality, the kind that stays flexable in very cold weather.

16.05.2025

M**N

Identical to the heavy duty one off the tool truck

Same heavy duty tester that cornwell offers or at least the one I've bought off the truck

28.04.2026

C**B

Would recommend

Diesel mechanic for over 35 years. OTC has always been great quality tools.

1.05.2026

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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45753CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.