how many amps does this pull on a 12v system?

Mine, with the factory installed bulb draws 157mA @ 13.1V... which comes to dash over 2W all said & done.

can it be used on 24 V AC circuit's

No it can't but the OTC 3642 will do 24v systems but I'm not sure about ac current though

Is this item computer safe?

Pulls, at peak, less than half an amp and 50 mA continuous. Use inline when circuit integrity testing and is very safe and useful when applied properly. Great for 5volt reference circuits. And yes this is the model ScannerDanner uses in 80% of his 1000+ videos.

I need to replace the fuse in my tester, I have 12v fuses just wanted to know what amp fuse is used.

They are 1.5v bulbs, not fuses.... low amp consumption. Otc sell them on Amazon. Do not use a fuse.

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OTC 3633 Mini-Coil Cord Circuit Tester , Red

OTC 3633 Mini-Coil Cord Circuit Tester , Red

Product ID: 6829449

Details

Brand
OTC
Color
Red
Item Weight
1 Grams
Power Source
Corded
Style
Modern

🔍Needlepoint stainless steel probe

🔴Bright red high-intensity bulb

🧰12-foot heavy-duty coiled cord

9742 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Power up your diagnostics with precision and style!

ERGONOMIC DURABLE - Slim, clear handle designed for comfort and long-lasting use
VIVID VISUAL FEEDBACK - Bright red, replaceable bulb ensures clear, instant circuit status
EXTENDED REACH FREEDOM - 12-foot coiled cord lets you tackle complex circuits without constraints
VERSATILE CONNECTIVITY - Threaded probe with screw-on alligator clip adapts to any testing scenario
PINPOINT PRECISION TESTING - Needlepoint stainless steel probe for effortless back probing and piercing

The OTC 3633 Mini-Coil Cord Circuit Tester is a professional-grade electrical testing tool designed for 6V and 12V systems. Featuring a needlepoint stainless steel probe, a bright red replaceable bulb, and a 12-foot heavy-duty coiled cord, it offers precise detection of shorts, grounds, and open circuits. Its ergonomic slim handle and versatile threaded probe with alligator clip make it an essential, durable tool for automotive and electrical diagnostics.

Specifications

ASIN	B003YNHVQQ
Best Sellers Rank	#82,277 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #125 in Circuit Testers
Brand	OTC
Brand Name	OTC
Color	Red
Compatible Devices	Vehicles with electrical circuits
Customer Reviews	4.7 out of 5 stars 995 Reviews
Global Trade Identification Number	00731413505751
Included Components	Product & Instructions Guide
Item Dimensions	2.85 x 8.55 x 1.7 inches
Item Weight	1 g
Item dimensions L x W x H	2.85 x 8.55 x 1.7 inches
Manufacturer	OTC
Measurement Type	Voltmeter
Minimum Operating Voltage	6 volts
Model	3633
Number of Items	1
Part Number	3633
Power Source	Corded Electric
Style	Modern
Style Name	Modern
UPC	731413505751 521375009516 071020055936 031112405384 523161139902 012302908908 999992883251
Unit Count	2261 Count
Warranty Description	One (1) year limited warranty

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