Horn question
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Cruiser
Joined: Jan 2011
Posts: 202
Likes: 2
Horn question
The stock horn on my 1991 FLT stopped working several years ago and I want to get it working again. I took horn off and hooked directly to fully charged battery (can't remember but I believe 12.5-13 volts) and it works fine. I put meter on two wires to horn from switch and get 11 volts with switch on. When you hook up horn and press switch it just makes a clunk or click type noise one time. The manual says if there is voltage (no amount specified) at the two horn wires with switch on the horn is bad, but the horn works great when hooked directly to battery. Should the horn work with 11 volts, what is my problem. Thanks!!
Road Warrior
Joined: Mar 2007
Posts: 1,959
Likes: 2
From: Florida
My ground strap has always been a problem. It gets rusty and it will only work at high rpm. I have to take emory paper to it and clean it up now and then. I just had to do it again a couple days ago.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,062
Likes: 4,547
From: Haslet Texas
What Jim was saying was to check the ground connection.
In other words take the ground off and make sure both ends are clean and making a good connection.
In other words take the ground off and make sure both ends are clean and making a good connection.
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Road Captain
Joined: Aug 2011
Posts: 538
Likes: 3
From: Florida
I'd be willing to bet if you checked voltage from the positive horn wire to the negative battery terminal the voltage would be higher than 11v, confirming that the ground wire at the horn is causing a problem.
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Intermediate
Joined: Jan 2013
Posts: 30
Likes: 0
From: San Dimas
Frame grounds are notoriously iffy, manufacturers in a lot of areas are finally addressing the issue as super low current applications like LEDs are more common, and a resistance problem with them shows up pretty quickly.
Either clean up your grounds as part of a biannual PM, or if you like projects run a negative buss, which is what I did with the Fatboy. Really cleared up her minor voltage issues.
