Beeping horn

Hi,

By any chance, is there an aftermarket alarm system installed on the vehicle? It sounds like it may be shorting. Also, does this happen at any specific time? For example, does the vehicle need to be running or does it happen when the vehicle is parked and the key is off?

Also, the other thing I'm thinking is there may be a problem within the steering column. The wiring to each of the items (wipers, horn, lights, and flasher) are routed in the column. I'm thinking there could be something via the horn that is shorting power to the switch.

Here are the test procedures for the switch. Take a look through them and let me know if this is something you feel comfortable doing. The attached pic correlates with the directions.

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2004 Dodge or Ram Truck Dakota 4WD V8-4.7L VIN N
Multi-Function Switch Test
Vehicle Sensors and Switches Sensors and Switches - Lighting and Horns Combination Switch Testing and Inspection Component Tests and General Diagnostics Multi-Function Switch Test
MULTI-FUNCTION SWITCH TEST
Refer to the appropriate wiring information.

Warning: on vehicles equipped with air-bags, disable the airbag system before attempting any steering wheel, steering column, seat belt tensioner, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury.

1. Remove the multi-function switch from the mounting housing on the steering column. (Refer to ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/ MULTI-FUNCTION SWITCH - REMOVAL).

Fig.15 Multi-Function Switch Tests
pic 1

2. Using an ohmmeter, perform the continuity and resistance tests at the terminals in the multifunction switch connector as shown in the Multi-Function Switch Tests chart.
3. If the multi-function switch fails any of the continuity or resistance tests, replace the faulty switch unit as required.

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Let me know as much as you can think of related to the issue. Also, let me know about the test.

Take care and Happy New Year,

Joe