Question about 1999 Chevrolet Lumina

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Trouble diagnosing horn

I am having issues diagnosing why my mom's horns are inoperative. I have done the following:

1. Checked the horn fuse.
2. Checked that the horn relay "clicks" with a 9-volt battery across the coil terminals. Also checked continuity across the other two switched terminals when energized. Relay operates as expected.
3. Checked voltage at the relay receptacle when the steering wheel is depressed. I get 12V at the relay coil terminals.
4. Shorted the terminal on the relay receptacle with 12V and the horn honked.

So I seem to have verified that all of the components and individual circuits are operating properly, but the system as a whole is inoperative. Any suggestions would be greatly appreciated.

Regards,
KH

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Make sure you have the ignition on or the car running and try again----if she has remote locks or starter does the remote sound the horn?

Posted on Jun 23, 2009

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Posted on Jan 02, 2017

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7a54f21.jpg

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