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Why doesn't my horn work?
https://slantsix.org/forum/viewtopic.php?t=24688		 Page 1 of 1
Author:  Daddiojoe [ Wed Aug 29, 2007 10:59 am ]
Post subject:  Why doesn't my horn work?
I need to get my truck through inspection, so I'm finally addressing my horn problem. I get a buzzing at the Painless Wiring replacement fusebox, but no honk.

So I try to make sure that the horn itself works by jumping it to the battery. It doesn't work, so I get a new horn.

This horn doesn't honk when attached directly to the battery either. How come? Do I need a relay? I thought that there was a relay in the Painless fusebox--do I need another one?

Thanks,

Joe
Author:  KBB_of_TMC [ Wed Aug 29, 2007 11:53 am ]
Post subject: 
Make sure the horn is properly grounded.

Most US horns have a grounded case to complete the circuit; many foriegn horns are floating and one of the 2 pins must be grounded for them to work. I've seen brand new universal replacements horns from the same vendor (F-something) with identical model numbers on the shelf with with some of one kind and some of the other.
Author:  SlantSixDan [ Wed Aug 29, 2007 1:45 pm ]
Post subject: 
Their name is ironic, given the degree and frequency of the pain caused by "painless" wiring's stuff. :-(

If you're getting a buzzing at the fusebox, it probably means your horn relay (installed there) is faulty.
Author:  Daddiojoe [ Wed Aug 29, 2007 5:29 pm ]
Post subject: 
Thanks for the replies, guys. I'll check the grounding of the horn.

Anyone have a part number for a nice generic horn relay?

Joe
Author:  SlantSixDan [ Wed Aug 29, 2007 7:02 pm ]
Post subject: 
If Painless Wiring are still using GM-style fuseboxes, the relay you need is probably something like a Standard HR151 is probably what's called for:

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