Horn problem
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6th Gear
Joined: Dec 2011
Posts: 11
Likes: 0
From: Winston Salem, NC
Horn problem
I have a 06 Flhtcui. Recently installed HD air horn. Worked well for about 2 weeks. Now I have no power to the horn. Checked wiring harness that I installed with fuse. Every thing seemed fine. Just wondering if there is a horn relay behind the faring that has gone bad. Everything from the battery to the horn seems ok. Even removed the tank just to see if wire was bad no luck. Need help.
Road Captain
Joined: Jan 2011
Posts: 547
Likes: 3
I have a 06 Flhtcui. Recently installed HD air horn. Worked well for about 2 weeks. Now I have no power to the horn. Checked wiring harness that I installed with fuse. Every thing seemed fine. Just wondering if there is a horn relay behind the faring that has gone bad. Everything from the battery to the horn seems ok. Even removed the tank just to see if wire was bad no luck. Need help.
Elite HDF Member
Joined: Sep 2007
Posts: 4,928
Likes: 69
From: Near Myrtle Beach, SC
Did you install it? These air horns pull a lot of current...upwards to 18 or so amps. So a relay with contacts rated at least at 20 amps is needed, preferably use a 30 or 40 amp relay to have the design margin needed. Anyway, if this was installed without a relay, then you have damaged, probably burned out, the horn switch contact. That switch was not designed to handle more than about 10 amps. You have some troubleshooting to do with a VOM.
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