Examination
Note. Check the fuse before starting work.
1. Disconnect the wiring connectors from the audio signals (pic. 20.1).
2. To test, apply battery voltage to the horn connectors using two wires. If the horns don't work, replace them.
3. If the horns work, measure the voltage at the horn connector terminals while the horn button is pressed. If voltage is present at the connector, check the grounding of the audio signals.
4. If there is no voltage at the connector. check horn relay (see paragraph 5).
5. If the relay is OK, check the control circuit and the power circuit of the relay. If there is no voltage in one of the circuits, check the wiring between the fuse and the relay.
6. If voltage is present at both ends of the relay, press the horn button and check the target between the relay and the horn switch, as well as the connection of the horn to the vehicle ground. Repair the connection if necessary. If the wiring is good, replace the horn switch.
7. If the connection of the horn switch to ground is good, repair the open or short in the wiring between the horn switch and the relay.
Replacement
8. To access the sound signals, remove the front left wheel locker (see chapter 11).
9. Disconnect the wiring connectors and remove the bracket mounting bolts (see fig. 20.1).
10. Installation is made in sequence, return to removal.