Download Check horn fuse 6 in the Power Distribution Center and fuse 7 in the Junction Block. If fuse is blown refer to FUSE BLOWN. If fuse is OK, refer to FUSE OK. Fuse Blown 1. Verify condition of battery terminals and voltage, refer to Battery If battery connections and battery charge is OK proceed to Step 2. . Using a voltmeter, test for battery voltage at both sides of horn fuse 7. If voltage is OK, on both sides of fuse, proceed to Fuse OK. If voltage is OK, on one side of fuse, the fuse is blown, proceed to Step 3. 3. Using a suitable ammeter in place of the fuse, test amperage draw of the horn circuit. If amperage draw is greater than 20 amps without the horn switch depressed, a grounded circuit exists between the fuse and the horn relay Proceed to Step 4. If amperage draw is greater than 20 amps with the horn switch depressed, a grounded circuit exists between the horn relay and the horn. Proceed to step Step 5. 4. Remove the horn relay from the Junction Block. If the amperage draw drops to 0 amps , the horn switch or circuit is shorted. If the amperage draw does not drop to 0 amps , repair short at the Junction Block.