Horn: Testing and Inspection

- Check the 20 amp fuse in cavity 8 of the junction block.
- Check the 40 amp fuse located in cavity 12 of the PDC.
- Press the horn switch and listen for the horn relay to click. A clicking relay indicates voltage is present up to the switch.
- Check for a good ground at the left strut tower for the left horn, and at the right frame rail for the right horn.