Where does blue and yellow hook too?

Your factory horn wires yellow is the hot wire

How do I wire in a separate push button? I can’t find information anywhere thanks.

If you're looking to bypass the existing horn & use it on push button only, this is what to do: Get rid of all the electric components. Wire through a fuse from positive + of battery to button +. Wire from - button to + of compressor of horn. Wire from - of compressor to negative - of battery or frame.

Could i install this under the hood of my truck or would it have to be put on the exterior?

Yes. I have a Nissan Hardbody and I have my under the hood. Just face the horn towards the front and your good.

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🚨 Make your presence impossible to ignore with the HK 150dB Air Horn!

RISK FREE UPGRADE - Backed by a 30-day money-back guarantee, 1-year warranty, and lifetime technical support for total peace of mind.
UNIVERSAL 12 V COMPATIBILITY - Seamlessly fits cars, trucks, SUVs, boats, and more with easy installation and a universal mount.
PREMIUM CHROME ZINC TRUMPETS - Durable, rust-resistant metal construction designed to withstand all weather conditions and last for years.
COMMAND ATTENTION WITH 150 D B POWER - Unmatched loudness ensures you're heard in any environment, boosting your road safety instantly.
ENHANCED AIR COMPRESSOR TECHNOLOGY - Bigger coil and stronger air pressure deliver a crystal-clear, piercing warning tone every time.

The HK 12V 150dB Air Horn features dual chrome zinc trumpets powered by an upgraded compressor delivering a powerful, clear warning sound. Designed for any 12V vehicle including trucks, boats, and SUVs, it offers weather-resistant durability and easy installation with a universal mount. This kit includes all necessary hardware and is backed by a 30-day return policy and 1-year warranty, making it a reliable and bold safety upgrade.

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Manufacturer	HK
Brand	HK
Model	air horn train horn for truck
Package Dimensions	31.2 x 17.4 x 10.1 cm; 1.24 kg
Item model number	B07YXV69KV
Manufacturer Part Number	B07YXV69KV
Colour	Black
Special Features	air horn train horn for truck train horn air horn for truck train horn kit train horn for car
Manufacturer	HK
Item Weight	1 kg 240 g

HK 12V 150db Air Horn, Dual Trumpet Chrome Zinc Air Horn with Compressor for Any 12V Vehicles Trucks Lorrys Trains Boats Cars Vans Kit (Black)

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