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the horn accuator on the steer. wheel just completes the 12v signal from the battery to the horn system.

the problem could lie in the horn accuator contact not releasing from the horn activator contact within the horn actuator assembly within the steerng wheel.

remove the accuator assembly on the s-w , check for a 'LOOSE WIRE'. there might be a "FUSED" contact. if wiring checks out "ok",put fuse in and check to see if horn stays on. if not, the problem is here.

repair as necessary.

if not here, a long process of tracking the wiring to the horn will be required here to find a possible short,. or possibly an open circuit

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Q: How do you replace or repair the car horn in a 2003 Mitsubishi Galant when the horn constantly goes off?
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