To troubleshoot, you need to consult your owner's manual. It will have a fuse box diagram showing the fuse ratings and what circuits each fuse protects. Look for fuses related to the horn, the power distribution center (under the hood), and possibly the interior fuse panel (usually under the dash).
General approach (but always refer to your manual):
1. Check the under-hood fuse box: This usually contains higher amperage fuses protecting larger circuits. Look for fuses labeled "horn," "accessory," or something similar. The manual will be crucial here.
2. Check the interior fuse panel: This often holds smaller fuses. Again, consult your manual to identify the relevant fuse(s).
3. Locate the horn relay: Your owner's manual might show its location. It's usually a small black square or rectangular component. You can try swapping it with a similar relay (if you have a spare, ensuring they have the same amperage and rating) to see if the problem resolves. If swapping relays fixes the issue, the original relay is bad.
Important Note: Before working on any electrical components, disconnect the negative battery cable to prevent accidental shorts or shocks.
Without your owner's manual, pinpointing the exact fuse is impossible. The manual is your best resource for this information.
