B1193
Symptom: The horn does not work The LED flashes during the delay period
Horn, open-circuit
Fault symptom
The horn does not work The LED flashes during the delay period
Conditions
Open-circuit registers diagnostic trouble code
Diagnostic procedure
1 Check fuse 23
2 Check operation of the horn.
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Connect the ISAT scan tool.
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Is horn function correct?
Continue with point 6.
Continue with point 3.
3 Check the horn's power supply
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Connect the test lamp to the two 1-pin horn connectors.
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Repeat scan tool command as point 2.
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When "ON" is selected, the test lamp should light.
Is the test lamp on?
Change the horn.
Continue with point 4.
4 Check the horn's +30 power supply
Connect the test lamp across the between the 1-pin horn connector, with the red lead, and a good grounding point.
The test lamp should light.
Is the test lamp on?
Continue with point 5.
Check circuit continuity, including the wiring between pin 1 of the connector and fuse 23.
5 Check the horn's ground connection
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Control module, pin 11 grounds the horn when it is activated.
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Check the continuity of the wiring harness between the horn's 1-pin connector with the black lead and control module pin 11.
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The resistance should be < 1 ohm.
Is the resistance correct?
Continue with point 6.
Repair or replace the wiring harness.
6 Check the generation of the diagnostic trouble code
Erase the diagnostic trouble code, test drive the car and check to see if the diagnostic trouble code is re-registered.
Is the DTC being registered?
See “Before replacing a control module”
The remedial measures taken were correct or the fault is of intermittent nature.
