1 horn sounds unprompted Mon Mar 04, 2019 3:27 pm
tinyspuds
Life time member
k
Hi,
I have an electrics problem I just can’t get my head around. Please work your magic.
Symptoms:
-About 100 miles ago (driving pretty much in a straight line) my horns gave a short burst without being asked.
-Over the next few days this happened a few more times.
-Yesterday this happened almost every time I turned the bars, until eventually the horn sounded constantly regardless of handlebar position until the ignition was turned off.
Investigation - bike cold:
-Replicated the short burst and continuous problem by moving the bars
-Very technically wiggled the horn wires, no reaction
-Fairing off, headlamp, running light, indicators, horns disconnected, using circuit tester on live could intermittently replicate problem by moving bars (no response on ground) - relay activating
-No trapped wires, No chaffing, No real tight spots
-Yanked every wire in front of headstock, no response
-Handlebar switchgear off inspected and contact sprayed
-Tank off, no visible issues, no response to more very technical wire wriggling
-All relays seated firmly, uncapped, contact cleaner, replaced and re seated.
At the weekend I renewed rear shock, changed final drive fluid, lubed splines and sorted an ongoing problem with lean in adjustment. Excited to test it all but frustrated by a force that can’t even be seen!
I’m pretty much at the point where I’m considering putting golf tees in the fuel pipes - as apparently that solves everything.
Used to the idea that Ks do stuff a bit special - so please tell me what I’m missing...
Thanks as always and in anticipation,
Stu
Hi,
I have an electrics problem I just can’t get my head around. Please work your magic.
Symptoms:
-About 100 miles ago (driving pretty much in a straight line) my horns gave a short burst without being asked.
-Over the next few days this happened a few more times.
-Yesterday this happened almost every time I turned the bars, until eventually the horn sounded constantly regardless of handlebar position until the ignition was turned off.
Investigation - bike cold:
-Replicated the short burst and continuous problem by moving the bars
-Very technically wiggled the horn wires, no reaction
-Fairing off, headlamp, running light, indicators, horns disconnected, using circuit tester on live could intermittently replicate problem by moving bars (no response on ground) - relay activating
-No trapped wires, No chaffing, No real tight spots
-Yanked every wire in front of headstock, no response
-Handlebar switchgear off inspected and contact sprayed
-Tank off, no visible issues, no response to more very technical wire wriggling
-All relays seated firmly, uncapped, contact cleaner, replaced and re seated.
At the weekend I renewed rear shock, changed final drive fluid, lubed splines and sorted an ongoing problem with lean in adjustment. Excited to test it all but frustrated by a force that can’t even be seen!
I’m pretty much at the point where I’m considering putting golf tees in the fuel pipes - as apparently that solves everything.
Used to the idea that Ks do stuff a bit special - so please tell me what I’m missing...
Thanks as always and in anticipation,
Stu
Last edited by tinyspuds on Mon Mar 04, 2019 4:30 pm; edited 1 time in total (Reason for editing : forgot about switch gear)
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1985 BMW K100RT + Hedingham HUB and LL’s. VIN 0028106.
1986 K100RS in boxes. VIN 0141918.
1954 Royal Enfield 350 Bullet. Original.
2000 Hayabusa with Charnwood chair, Wasp forks and EZS wheels.