Can this find a dead short?

Depends on the situation. It’s more for finding the cable pathway, but could help find a dead short.

Can I trace from a light fixture back to a switch? (I can not find how to turn on a few lights in my new house)

this tracer work's better on energized circuits but will also work with de-energized circuits. if your light is not energized, then hook up the transmitter to it and then use the receiver to follow the wire through walls and ceilings to find your switch. You may have to set the detection level higher on the receiver for this use.

Will this tracer generate an audible tone when connected to 14/2 speaker wire?

Don’t know. I’m deaf and just look at the visual readout.

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Advanced Circuit Breaker Finder and Wire Tracer Kit for Energized and Non-Energized Breakers, Fuses, and Wires ET450

Advanced Circuit Breaker Finder and Wire Tracer Kit for Energized and Non-Energized Breakers, Fuses, and Wires ET450

Product ID: 646700923

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Details

Brand
KLEIN TOOLS
Power source
Battery
Style
Circuit
Colour
Multi
Item weight
907 g

📡98% accurate signal detection

🧰complete kit with all accessories included

⚙️adjustable sensitivity for diverse materials

Description

⚡ Master your circuits like a pro—never lose track again!

ALL IN ONE PRO KIT - Includes transmitter, receiver, multiple lead adapters, alligator clips, and a rugged carrying case for ultimate convenience.
PINPOINT PRECISION - Trace energized & non-energized circuits with 98% accuracy for flawless electrical diagnostics.
READY OUT OF THE BOX - Comes with batteries and clear instructions so you can start your project immediately without delays.
VERSATILE TRACING POWER - Effortlessly trace wires, fuses, breakers, conduit, and isolate single wires within bundles—perfect for complex jobs.
CUSTOM SENSITIVITY CONTROL - Easily adjust receiver sensitivity to detect signals through drywall, cement, or underground obstacles.

The Klein Tools ET450 Advanced Circuit Breaker Finder and Wire Tracer Kit delivers professional-grade accuracy and versatility for tracing energized and non-energized electrical components. Featuring adjustable sensitivity to penetrate drywall, cement, and underground materials, this all-inclusive kit comes with everything needed for precise circuit identification and troubleshooting, making it an essential tool for electricians and serious DIYers alike.

Specifications

Manufacturer	KLEIN TOOLS
Part number	ET450
Item Weight	907 g
Product Dimensions	40.94 x 32.39 x 10.16 cm; 907.18 g
Batteries	10 AA batteries required. (included)
Item model number	ET450
Size	One Size
Color	Multi
Style	Circuit Testers
Finish	Brushed
Material	Blend
Pattern	Kit
Shape	Rectangular
Item thickness	4 Inches
Power source type	Battery Powered
Item Package Quantity	1
Measurement Accuracy	98%
Display Style	Reciever: LCD with Backlight
Specification met	[Inferred] Meets Certain Specifications
Included components	Advanced Circuit Tracer Kit
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline

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