Troubleshooting
If the horn does not sound or sounds weak, check for the following:
- Discharged battery. To charge battery, see 1.22 BATTERY MAINTENANCE.
- Loose, frayed or damaged wiring to horn terminal.
If battery is charged and wiring appears to be in good condition, perform a VOLTAGE TEST for the following:
- Inoperative horn switch.
- Open circuit to horn.
- Open ground to frame.
- Inoperative horn.
Voltage test
1. Remove terminal clips from horn spade connectors.
2. Connect voltmeter leads, positive (+) to wire terminal and negative (-) to ground.
3. Turn ignition switch ON and press horn switch.
4. If battery voltage is not present, check for the following:
- a. Horn switch is inoperative. Replace switch. See 6.35 LEFT HANDLEBAR SWITCHES.
- b. Wiring to horn is open. Repair wiring.
5. If battery voltage is present, check for the following:
- a. Ground is open between mounting hardware or ground wire. Repair wiring.
- b. Horn is inoperative. Replace horn. See 6.32 HORN, Replacement: Front Mount.
Replacement: front mount
FASTENER | TORQUE VALUE | |
Horn mounting screw | 36-48 in·lbs | 4.1-5.4 Nm |
1. See Figure 6-133. Remove terminal clips from horn spade connectors (1, 3).
![](https://motoinstruction.ru/img/harley/12/118371.jpg)
Figure 6-133. Horn components: 1. Right spade connector; 2. Horn bracket; 3. Left spade connector; 4. Screw (3); 5. Horn assembly; 6. Lockwasher (3); 7. Screw (2); 8. Washer (2)
2. Remove screws (4) and lockwashers (6) from horn bracket (2). Remove horn assembly (5).
3. Install horn assembly with screws and washers into horn bracket. Tighten to 36-48 in·lbs (4.1-5.4 Nm).
4. Install the yellow wire with black tracer to the left spade connector (3) and the black wire to the right spade connector (1).
Replacement: side mount
FASTENER | TORQUE VALUE | |
Horn, side mounted, stud nut | 80-100 in·lbs | 9.0-11.3 Nm |
Horn, side mounted, acorn nut | 60-180 in·lbs | 6.8-20.4 Nm |
1. See Figure 6-134. Remove terminal clips from horn spade connections on back of horn (12).
![](https://motoinstruction.ru/img/harley/12/118372.jpg)
Figure 6-134. Side mount horn components: 1. Clip nut (2); 2. Cover and bracket; 3. Acorn nut; 4. Lockwasher; 5. Support bracket; 6. Rubber mount; 7. Locknut; 8. Screw (2); 9. Clamp; 10. Nut; 11. Washer (2); 12. Horn; 13. Screw (2); 14. Mounting bracket
2. Remove acorn nut (3) and lockwasher (4) to free horn assembly from rubber mount (6) stud.
3. Remove wire conduit from clamp (9) at back of support bracket (5).
4. Remove nut (10) from circular recess at back of chrome cover and bracket (2) and remove horn (12) from cover and bracket.
5. Install horn (12) with chrome cover and bracket (2) through hole in horn support bracket (5). Apply two drops of LOCTITE 262 HIGH STRENGTH THREADLOCKER AND SEALANT (red) to threads of nut (10) and install. Tighten to 80-100 in·lbs (9.0-11.3 Nm).
6. Attach the yellow wire with black tracer to front terminal and the black wire to rear terminal. Push wire conduit into clamp (9) at back of horn bracket (5).
7. Install support bracket (5) on rubber mount (6) stud with lockwasher (4) and acorn nut (3). Tighten to 60-180 in·lbs (6.8-20.4 Nm).