Possible Causes

HORN IS ALWAYS ON - PINPOINT TEST REFERENCE

PINPOINT TEST 2		THE HORN IS ALWAYS ON
STEP	INSPECTION		ACTION
1	CHECK THE DTCs FROM THE SJB SELF-TEST Check the recorded results from the SJB self-test. Are any DTCs recorded?	Yes	For DTC B1897, Go to step 4. For all other DTCs, Go to DIAGNOSTIC TROUBLE CODE (DTC) INDEX - B, C AND U CODES .
1		No	Go to next step.
2	CHECK CIRCUIT (L/W) FOR A SHORT TO VOLTAGE Key in OFF position. Disconnect: SJB J-2280a. Does the horn continue to sound?	Yes	Repair the circuit. Test the system for normal operation.
2		No	Go to next step.
3	CHECK THE SJB FOR INTERNAL FAULTS Key in OFF position. Connect: SJB J-2280a. Disconnect: J-2280d. Does the horn continue to sound?	Yes	Install a new SJB. See SMART JUNCTION BOX (SJB) , . Test the system for normal operation.
3		No	Go to next step.
4	CHECK CIRCUIT (Y/R) FOR A SHORT TO GROUND Connect: SJB J-2280d. Disconnect: Clockspring 0922-202a. Does the horn continue to sound?	Yes	Repair the circuit. Clear the DTCs. Repeat the self-test.
4		No	Go to next step.
5	CHECK THE CLOCKSPRING FOR A SHORT TO GROUND Remove the driver air bag. See DRIVER AIR BAG MODULE , . Disconnect: upper clockspring connector. Measure the resistance between the upper clockspring pin 5, component side and ground. Is the resistance less than 5 ohms?	Yes	Install a new clockspring. See CLOCKSPRING , . Test the system for normal operation.
5		No	Install a new steering wheel. See STEERING WHEEL , . Test the system for normal operation.