What Causes the BMW Horn to Sometimes Not Work?
1 Answers
Horn intermittently not working or sounding hoarse is mainly caused by insufficient battery charge, damaged horn relay and button, or horn damage. The solutions are as follows: Check the power system: Turn on the headlight switch. If the headlights do not light up or appear dim, start the engine and slightly increase the throttle. If the headlights return to normal brightness and the horn works, it indicates insufficient battery charge. In this case, check the battery and its connecting cables as described earlier. If the battery charge is insufficient, the car can still operate normally. When the horn is needed, simply increase the throttle appropriately. Check the relay: If the headlights are functioning normally, press the horn button and check if the relay makes a clicking sound. If it does, the issue may be a damaged horn or poor grounding. Replace the horn assembly or address the grounding issue accordingly. The horn relay is typically located below the left side of the steering wheel. For different vehicle models, refer to the owner's manual and the fuse and relay identification plate in the car. The horn is usually located behind the radiator (coolant tank). If the horn has poor grounding, remove and reinstall it. If the horn is damaged, replace it with a new one.
