No Horn, brake light, tail light, tag light!

scott123007

Well-Known Member
Joined
Jul 27, 2012
Messages
1,484
Location
Jupiter, Florida
I would be grateful, if the powers that be, could tell me where to find the FUSE that operates these. I have traced it to a brown wire, and my service manual for my 2014 shows a fuse, but for the life of me, I can't find it! It is not in either of the two fuse boxes under the RH cover, and I can't locate other fuses other than ABS and starter relay.
Thanks
 

scott123007

Well-Known Member
Joined
Jul 27, 2012
Messages
1,484
Location
Jupiter, Florida
Thanks Rob, but my bike is a 2014 and the wiring is different than Gen 1. (My signals work fine) The FSM "claims" there is a fuse for the brake light/ tail light etc. I just can't find it in either of those two boxes.
 

RCinNC

Well-Known Member
Joined
Aug 30, 2014
Messages
2,875
Location
North Carolina
According to my service manual, the fuse for the brake light is in position 6 in the right side lower fairing, so it isn't in those two small fuse boxes. It already sounds like you have a service manual, but I can post a photo of the fuse layout if you want.

I have a 2014 non ES.
 

bimota

Moderator
Staff member
Global Moderator
Joined
Dec 10, 2017
Messages
6,701
Location
bridgend, Wales, UK
CAN I ASK, those 2 fuse boxes in the manual that i showed above whats different in the 2 boxes from a gen 1 and a gen 2 then, also are the fuses
in the 2 boxes different from a UK bike and a USA bike


rob
 

bimota

Moderator
Staff member
Global Moderator
Joined
Dec 10, 2017
Messages
6,701
Location
bridgend, Wales, UK
so you have a brake light fuse, and a parking light fuse, whitch one covers your tail light, my gen 1 has just a tail light, no brake light, no parking light

rob
 

scott123007

Well-Known Member
Joined
Jul 27, 2012
Messages
1,484
Location
Jupiter, Florida
@Rob, I'm not sure what the differences are between gen 1 and 2 but they definitely are different, with cruise control, etc. And, USA bikes don't have imobilizers, so there's that. I suspect, but I'm not sure, I think that one fuse on a Gen 2, controls the horn, brake light, tail light, tag light, and the little lights in the headlight that come on before you start the bike. The cruise control is not working either, but I have a feeling it is tied into the brake light not working.

@RC, thanks for posting that page. I have a FSM, but was too stupid to look for fuse locations other than trying to figure it out from the wiring schematic, which made no sense compared to the two fuse boxes under the right cover.
One thing I'm a little confused about though, unless I am reading it wrong, aren't the cowlings the opposite of what they say above? In other words, my fuse boxes are under the RH LOWER cowling, I pulled the UPPER, to find the fuse I am looking for. At any rate, I think I have bad news for myself. The fuse is ok. There is no power going to either side of the fuse box. Somehow, I think I have a bad brake light relay. This is what is happening. If I apply 12v to the brown wire side of the fuse box, I get ALL the lights and the horn, BUT my brake light is on and won't go off. If I apply 12v to the green/white wire side of the fuse box, I hear a click, which is my brake light relay. But here's the catch... if I disconnect the relay, and then apply power to the brown wire side of the fuse box, all of my lights work, EXCEPT for my brake light. That is as far as I have gotten, but I suspect there is something wrong with the relay and it is not letting power get to the green/white side of the fuse box.
Thanks again for your help, Rob and RC.
 

scott123007

Well-Known Member
Joined
Jul 27, 2012
Messages
1,484
Location
Jupiter, Florida
On second thought, it might be more serious than that.There are 4 wires going to the brake light relay. Two yellows, joined together, so that counts as one, two green/black joined together, so that counts as two, a black, and a brown. One of the two yellows goes to the brake light, but the other goes to the ABS ECU. One of the green/black goes to the brake light switch, but the other goes to the MAIN ECU. The brown, which I'm assuming gets power from one of the yellows, or one of the green/black's, powers all the lights and horn that are not working, and of course the black is ground. I tried to borrow the radiator fan relay to see if anything would be different with another relay, but unfortunately, the post configuration is different. I can't go any further than this with an OHM meter, but either the yellow that runs to the ABS ECU or green/black wire that runs to the main ECU is supposed to be powering that brown wire at some point, and they each go to their respective ECU's, so it might be an ECU problem:mad:
 
Last edited:

RCinNC

Well-Known Member
Joined
Aug 30, 2014
Messages
2,875
Location
North Carolina
Good catch, I transposed Cowling A and B way back when I made my quick reference guide for my phone, and never caught the error until you noticed it.

Wish I could offer some advice on your current issue, but I'm in over my head pretty quickly with electrical stuff.
 

RCinNC

Well-Known Member
Joined
Aug 30, 2014
Messages
2,875
Location
North Carolina
To make up for accidentally being a purveyor of misinformation, I'm attaching a revised fuse diagram, in case anyone wants to download it and keep it handy.

fuses.jpg
 

scott123007

Well-Known Member
Joined
Jul 27, 2012
Messages
1,484
Location
Jupiter, Florida
@ RCinNC
Thanks for fixing your fuse diagram! LOL

And as a follow up, it WAS the signaling fuse after all. My bad. I had ultimately narrowed it down to the brown wire not getting current so I was getting ready to dissect the ignition switch because I "thought" I checked ALL of the fuses in the boxes first. :mad:
I thing the original culprit was the horn going bad and blowing that fuse. New horn, new fuse. All is well! :D
 
Last edited:
Top