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Premium Member
2014 Impreza Ltd CVT
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3,319 Posts
From the wiring diagram, the Horn relay is used for both the Cruise activation on that steering wheel switch AND horn activation. So that 3 wire connector has a Green wire with red stripe on it that is not only used for the cruise, but that smaller single spade wire from it is used for the horn switch on the steering wheel.

Since you are not using the cruise and want the horn to work, you must connect pin 1 of the 3 wire connector to that spade lug connection.
 

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Premium Member
2014 Impreza Ltd CVT
Joined
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3,319 Posts
YES that's the wire you want to run and connect.

You are using the CRUISE switch for the DRIVE-BY-WIRE system. It has the off/on on the stalk instead of the dash.

The older system ( throttle cable ) is a separate processor hence the separate controls. The Drive-by-wire system, the cruise processor is a co-processor in the ECU and controlled by the all-in-one switch on the steering wheel. This is also what causes the newer vehicles to DISABLE the cruise when a code is set in the ECU. They are both housed and ultimately controlled by the ECU micro-processor.
 
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