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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?

It’s not Led, incandescent bulb.

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

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?

Not without modifications or using a small low wat incandescent

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⚡ Power up your diagnostics with precision and style!

ERGONOMIC CLEAR HANDLE - Slim, comfortable grip designed for extended use without fatigue.
DURABLE HEAVY DUTY CORD - 12-foot coiled cord ensures flexibility and longevity on the job.
RELIABLE BRIGHT INDICATOR - Replaceable red bulb offers clear, immediate visual feedback.
DUAL VOLTAGE COMPATIBILITY - Seamlessly tests both 6V and 12V electrical systems.
PRECISION CIRCUIT DIAGNOSIS - Pinpoint shorts, grounds, and open circuits with ease.

The OTC 3634 Heavy-Duty Straight Cord Circuit Tester is a professional-grade tool engineered for accurate electrical circuit testing. Featuring a robust 12-foot coiled cord, it supports both 6V and 12V systems, while its ergonomic clear handle and bright replaceable red bulb ensure comfort and clarity during use. Ideal for locating shorts, grounds, and open circuits, this tester combines durability with precision for the savvy technician.

Have a Question? See What Others Asked

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?

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

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

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?

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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E£ 6995

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TrustScore 4.5 | 7,300+ reviews

Meera L.

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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

OTC3634 Heavy-Duty Straight Cord Circuit Tester, Red

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