When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have the Wolo BadBoy, when I wired it up according to the supplied wiring diagram, the horn always on. I wired up the relay this way (from my car stereo install days, long time ago) and is working fine:
87 to battery
86 from original horn wire
85 to ground
30 to Wolo horn
I don't think this have anything to do with your problem, though.
Assuming that pins 85 & 86 excite the coil & operate the relay, & that pins 30 & 87 are the contacts of the coil you have done nothing wrong. Since the horn operates that should be correct. If all those assumptions are correct, you have a bad horn.............
Run heavier gauge wires. Especially the ground wire from the horn. If I remember correctly, the kit to install the HD air horn recommends it for the exact problem you state.
When I first installed mine I wrapped some self adhesive foam around the compressor and it blocked the air intake: after I figured out the problem she worked great.
Last service the dealership unhooked the 2 wires for some reason and when the hooked them back up they did it backwards. No problem, after I figured it out.
Also blew a relay in a heavy rainstorm last year and had to replace the relay... make sure all your wires are covered well.
Your schematic is correct. I`ve worked with relays a long time and #30 is allways battery power. You must have a bad horn. Only other thing I`d try is a better ground connection at the horn.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.