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.

Otc 3633 Mini Coil Cord Circuit Tester Red

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Description

🔧 Get wired for success with the OTC 3633!

📏 ERGONOMIC DESIGN - Slim handle and coiled cord ensure comfort and ease of use during long testing sessions.
🔋 DUAL VOLTAGE CAPABILITY - Perfectly compatible with both 6V and 12V systems for versatile applications.
💡 BRIGHT BOLD VISIBILITY - Equipped with a high-intensity replaceable bulb for clear readings in any environment.
🛠️ VERSATILE PROBING OPTIONS - Includes a threaded probe with a screw-on alligator clip for enhanced functionality.
🔧 EFFORTLESS ELECTRICAL TESTING - Easily locate shorts, grounds, and open circuits with this user-friendly tool.

The OTC 3633 Mini-Coil Cord Circuit Tester is a reliable and efficient tool designed for electrical system testing. With its 12-foot heavy-duty coiled cord, ergonomic design, and high-intensity bulb, it simplifies the process of locating shorts, grounds, and open circuits in both 6V and 12V systems. The stainless steel needlepoint probe and alligator clip add versatility, making it an essential tool for professionals.

Specifications

ASIN	B003YNHVQQ
Best Sellers Rank	#247,088 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #367 in Circuit Testers
Brand Name	OTC
Color	Red
Customer Reviews	4.8 4.8 out of 5 stars (963)
Global Trade Identification Number	00731413505751
Included Components	Product & Instructions Guide
Item Dimensions	7.2 x 21.7 x 4.3 centimeters
Item Weight	1 Grams
Manufacturer	OTC
Maximum Operating Voltage	12 Volts
Measurement Type	Voltmeter
Minimum Operating Voltage	6 Volts
Model	3633
Part Number	3633
Power Source	Corded Electric
Specification Met	UL 61010-1, CE Marked, RoHS Compliant
Style Name	Modern
UPC	731413505751 521375009516 071020055936 031112405384 523161139902 012302908908 999992883251
Unit Count	2261 Count

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