How to troubleshoot a non-functioning horn in the Great Wall C30?
2 Answers
Turn on the headlight switch; if the headlights do not light up or appear dim, start the engine. If the headlights then function normally and the horn sounds, it indicates insufficient battery charge. Press the horn button and check if the relay makes a "clicking" sound. If the horn has poor grounding, remove and reinstall it. If the horn is damaged, replace it with a new one.
I've repaired quite a few Great Wall C30 models with non-functional horns, as horn issues are quite common. First, check if the fuse is blown. There's a fuse box on the lower left side of the driver's compartment—look for the one labeled 'HORN' and pull it out to inspect for any breaks. If the fuse is intact, proceed to examine the horn itself. Open the hood, locate the horn, and check if the connector is loose. Use a multimeter to measure the resistance; normal values should be within a few ohms. If the reading is too high, it indicates a burnt coil that needs replacement. Wiring issues are also frequent, especially with the harness under the steering wheel, which can short-circuit or break due to long-term friction—try reconnecting it firmly. The switch button might have poor contact or internal wear; press it and listen for any faint sounds. Check the relay, which controls the current flow—try replacing it. Safety first: if you've checked everything and still can't fix it, or lack the tools, I strongly recommend visiting a 4S shop for professional help to avoid travel disruptions. During routine maintenance, ensure the horn's dust cover isn't clogged—cleaning it can extend its lifespan.
