Was that a BMW supplied horn? As posted above, had the same with ones off of eBay, but the ones from the parts dept have been fine for years. That was on a 1200RT and a 1250RT
Cheap horn upgrade
- Thread starter Oldrat
- Start date
Off eBay but same part number
Probably pulling too much current from the Canbus driven circuit. I did a direct replacement of my 1200 horn with the usual Nippy Norman replacement ( can't remember what it's called) and had exactly the same problem as you describe. Switching off and on again resets the circuit. I had to use an interposing relay to make it work.
The horn on the 1250 is better but I'm considering using both at the same time
Ive Purchased a Fiamm horn for my 1290. Fitted it. Test the results, a short blast ( 2 seconds) then Toot Toot Toot just like yours and a red warning across the screen, General Failure had come up. Took it off and put the original horn back on.
Must be something with the power draw that can bus system does not like.
Wiring through a standard 4 pin relay will solve it.
The power to drive the horn with come from a fused feed direct from the battery/other source.
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Thank you Nigel.
I am sure there are workaround scenarios out there, I just wasn’t caring enough at the time, beyond being somewhat annoyed and disappointed all same.
Same boat. I’m more likely to cut the plastic horn cover off the car version and glue it onto the original than add a relay! That’s the bit that changes the sound anyway!
I ran the Denali soundbomb Split and the original unit - not much difference tbhProbably pulling too much current from the Canbus driven circuit. I did a direct replacement of my 1200 horn with the usual Nippy Norman replacement ( can't remember what it's called) and had exactly the same problem as you describe. Switching off and on again resets the circuit. I had to use an interposing relay to make it work.
The horn on the 1250 is better but I'm considering using both at the same time
so i got rid of the soundbomb
If you can find a way to mount a set of Fiamm dual tone you'll dump all those compressor horns in the bin.
These are loud but the tuned dual tone is what makes them command attention. People will think there's a 71 Chrysler Newport bearing down on them
These are loud but the tuned dual tone is what makes them command attention. People will think there's a 71 Chrysler Newport bearing down on them
The main question is , is it easy to fit and how loud is it ?
Clicked in here expecting recommendation of some sort of cream or pump device at a competitive price. Sorely disappointed. I'll get me coat. 
Not easy to fit, bracket, wiring and a relay required. They're nothing like as loud as a sound bomb and their quality isn't what it used to be. Plus there loads of rip offs, expect to pay about £40ish for genuine set.
Sound bomb cost more yes, but it's a plug and play.
How about this set of original BMW Bosch Horns from James Sherlock….
Bit wiring, relay and Bobs your uncle….
Bit wiring, relay and Bobs your uncle….
BMW R1150RT 2003 77,318 miles horns pair (8148) | eBay UK
BMW R1150RT 2003 77,318 miles (8148). Horns pair. In good working order. Used Parts.
www.ebay.co.uk
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