View Full Version : HELP! Horn Replacement, '07 BMW R1200RT.

04-08-2009, 03:20 AM
I hope that there is someone who can help me. I bought a FIAMM model 40310 horn to replace the "less-than-noticeable" original horn that came on my '07 BMW R1200RT. After disconnecting the original horn I found that it has a connector that has two very small contacts and the Fiamm that I hope to replace it with has two larger "spade" connections on it. There is two wires on both, but I am reluctant to connect they in any way for fear of doing damage to the Can-Bus system. Anyone had any experience with this situation? Should I just forget about the new horn and just continue to shout at other motorists?:scratch

04-08-2009, 03:51 AM
In this thread here somebody with an R12RT talks about replacing the horn. (http://www.bmwmoa.org/forum/showthread.php?t=22062&highlight=horn)

Response #4 the guy says he does just what you want to do with not just one, but with 2 horns. Check it out.

04-08-2009, 06:43 PM
See: http://r1150r.org/board/viewtopic.php?p=150682#p150682 for a BMW "Repair Connector" that will plug into the wiring harness in place of the horn. You can then take the leads from the repair connector and put spade connectors on the ends - and voila! You're set to stop yelling without having to hack up your wiring harness.

04-09-2009, 05:08 AM
;) Thanks for the replies, good references, I appreciate the help. Having all the plastic off now for some pre-season work, it's a good time to get this horn replacement done.

04-09-2009, 09:05 AM
I put two Fiamms (high and low) on my Moto Guzzi. It was great - sounded like car horns used to sound.

I (with Ben Lower doing most of the work) installed a Stebel air horn on my RT and it's even better than the Fiamms. Just something to consider while you have things apart.

04-09-2009, 01:14 PM
I recently installed a Stebel air horn on my '07 R1200ST. I ran 12 gauge wire from the battery + and - up to the front of the bike. I installed a fuseholder with a 30amp fuse near the battery on the + side. The battery - went directly to the horn. The battery + went to one side of a relay, then on to the horn.

I removed the old horn and cut off the odd connector BMW had used there. I crimped shielded female quick connect spades to the ends and installed them on the control circuit for the relay.

I installed a Fuzeblock and moved my non-CANBUS accessory outlet to the left dash panel all at the same time. In this photo, you can see the master 30 amp fuses I used for the Fuzeblock and the horn:


In this photo, you can see the horn relay on the right. The white lead is battery +, the brown is battery -, and the green is the relay switched + that goes to the horn. The two small wires are the original horn wires:

04-15-2009, 01:27 AM
I made a home made canbus connector from two pins from my wifes sewing box with wires sodered on. I am working on how I did it complete with photos.:type E-mail me for Pictures and quick how-to.

04-16-2009, 03:02 PM
Hi Folks,
Just for future reference. The horn from an '05 RT sounds like a Plymouth! People really jump when I honk at them :whistle . I had the dealer install it since my scoot is still under warranty. Ride safe! :usa