The horn in my pilot started going off. It's a constant blaring noise, not like the alarm. It's like someone is holding the horn down.
I have replaced both horns, the fuse, and what I believe is the horn relay. It's possible that I replaced the wrong relay. I can't find a diagram that labels the proper horn relay anywhere. Not on Google or the 2000 page Honda Service Manual.
Can someone please tell me where the horn relay is, before I rip the steering wheel apart and replace the horn pad and clock spring?
If it's not a relay, what else could it be?

 

https://charm.li/Honda/2009/

 

I appreciate this link. It still doesn't tell me or show me which of the 3 relays in the MICU box control the horn. I replaced number 3 - horn still blaring uncontrollably.

 

You need to navigate the manual to where the info is. I'd start with the horn.

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Home >> Honda >> 2009 >> Pilot 2WD V6-3.5L >> Repair and Diagnosis >> Lighting and Horns >> Horn >> Diagrams >> Electrical Diagrams

Electrical Diagrams

Diagrams: Other diagrams referred to by number (See Diagram ##-#, etc.) within these diagrams can be found at Diagrams by Number. Diagrams By Number

Locations: Location photographs (references to PHOTOS) referred to within these diagrams can be found at Locations by Photo Number. Component Locations

Connector Views: Connector terminal views (references to VIEWS) referred to within these diagrams can be found at Connector Views by View Number. Connector Views By View Number


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BTW the relay is internal to the MICU

 

Thanks. So if the fuse is good and my MICU is good, I need to test the horn switch in the hatch on the steering column. I'm pretty sure its either the horn pad or the horn spring. Looks like I'm ripping apart my steering wheel.