What Causes a Car Horn to Stop Working When It's Cold?

[DiCarmen]

There are several reasons why a car horn may stop working when it's cold, including poor connection wiring, steering wheel issues, fuse box connector problems, and poor sealing leading to moisture. Poor connection wiring: If the horn sounds intermittently when pressing it while turning the steering wheel in a cold car, it indicates loose or poor connection wiring at the steering column. The solution is to promptly inspect and repair the relevant wiring. Steering wheel issues: There is a spring-loaded plunger in the steering wheel that requires grease lubrication. In cold weather, the grease may become sticky and prevent the plunger from returning, affecting the horn's operation. The solution is to extend the warm-up time (though this may not be suitable for all car models). Fuse box connector problems: If there is a poor connection between the horn and the fuse box, thermal expansion and contraction can cause the connection to fail in cold conditions. The solution is to disconnect and reconnect the connector. Poor sealing leading to moisture: Although the interior of the horn is a sealed space, if the sealing is not tight, moisture from car washing or water vapor in the internal air can cause the contacts to become damp and malfunction. The solution is to check if water has entered the horn and maintain a dry environment.