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Horns - Poor Tone

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
Horns - Poor Tone

Step Action Yes No
1 Did you perform the Horns Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Horns 
2 Depress the horn switch.
Does the horn have a harsh tone or buzzing?		 Go to Step 3  Go to Symptoms - Horns 
3
  1. Test the horn mounting hardware for adequate torque. Refer to Fastener Tightening Specifications .
  2. Inspect the horn for debris in the joint where the horn attaches to the vehicle.
Did you find and correct the condition?		 Go to Step 7  Go to Step 4 
4
  1. Disconnect the horn connector.
  2. Connect a 15-amp fuse jumper wire between the positive battery terminal and the control terminal of the horn.
  3. Connect another jumper wire between the negative battery terminal and the ground terminal of the horn.
Does the horn have a harsh tone or buzzing?		 Go to Step 6  Go to Step 5 
5 Repair the high resistance in the horn control circuit or the horn ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 7  -
6 Replace the horn. Refer to Horn Replacement .
Did you complete the replacement?		 Go to Step 7  -
7 Operate the horn.
Does the horn operate properly?		 System OK Go to Step 1 
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