2007 XB12X Ignition Fuse Blowing?

Buellxb Forum

Help Support Buellxb Forum:

S

streetfighterxb9s

Active member
Joined
Nov 25, 2008
Messages
31
Location
Dothan, AL
Just replaced the battery in my 2007 Ulysses and started it multiple times with no issues. Took it out for a ride this morning and it has never ran better! Got approximately .75 miles from my home and lost all power to the bike while riding down the road. Tried to restart it and no power to the gauge cluster. Pulled over and checked fuses, found 15 amp ignition fuse blown. Replaced it with the spare 15 amp fuse, now had power back to the gauge cluster, so restarted the bike. Bike ran for approximately 3-5 seconds and lost all power again. Checked ignition fuse again and it is blown again?!?!?! Any suggestions??:confused:
 
Trace the wiring. Sounds like a frayed wire making contact with something.
 
Is the battery positive red boot on the terminal where it should be? Sometimes the Uly seats hit it.

But yes, something in the ignition circuit is shorting to ground. Only you can find it.

The manual (with wiring diagram) is at Buellmods.com or Buelltooth.com
 
in all likelihood it is 1 or more of the below all of which run on the ignition fuse circuitry. check all carefully. #1 in particular plagued many 05-07 model XB's:
1-chafed fuel pump internal wire shorting to ground....offending wire typically color brown.
2-rear injector positive feed wire rubbing on rocker box cover.
3-infamous #77 connector flaring up. it's the large wiring connector behind the plastic front pulley cover that ties the VR and main power feed into the battery and rest of the electrical system.
4-main wiring loom chafed and shorting out in vicinity of steering neck.
5-small cluster of wires in insulated loom running from front of motor down over top of right side of muffler behind the lower cowling. often tend to rub against right side cowling-to-muffler bracket shorting out.
NOTE: your next question typically is "how the hell do i check fuel pump internal wiring if at fault?" simple! and i'd do this before anything else in the steps i provided:
A-key off....replace ignition fuse....go to left lower frame spar and locate your fuel pump. now unplug the wiring harness.
B-key to on....red run switch to on. fuse ok? you just found the problem. it's the pump.
 
Last edited:
streetfighterxb9s said:
Thanks for the info lunaticfringe!
Click to expand...


yes sir always my pleasure. with a dead-short such as this i always start with the easy, obvious known culprits first before tearing into wiring harnesses and bundles of wires which is a monumental PITA! start with the fuel pump as mentioned then move to the other items as mentioned. chances are excellent that's where the short will be found. let me know your progress/outcome as it helps other board members.
 
06 Ulysses
I had the dreaded ignition fuse blowing problem and thought i'd add my experience for others that may have this problem in the future. I tried all the checks in Lunaticfringe's above post to no avail. After studying the wire diagram i figured out that you can hook up a meter between pin 4 on the diagnostic plug and ground. Set the meter to ohms if the meter reads 0 ohms then you have a short to ground. This lets you check the wire harness by moving it around and gives immediate feedback when you find the problem area without wasting a bunch of fuses. My problem was in wire that goes to the top of the motor and feeds the coil and injectors. About an inch above where it connects to the main harness on the left side of the front cylinder head. It had rubbed through the cloth loom tape and the insulation of the gray wire and shorted out on the plug wire. Easy fix after i found it!
 
Thanks i'm new to Buell but have been a motorcycle nut for many years. I always seem to have a collection in the shop! Bought the Ulysses to chase my wife around when she's riding her Ryker. Buells are like a sickness,,, ahh what can i sell to make room for another one. That's a good one 34nineteen had to google it!
 
starman said:
06 Ulysses
I had the dreaded ignition fuse blowing problem and thought i'd add my experience for others that may have this problem in the future. I tried all the checks in Lunaticfringe's above post to no avail. After studying the wire diagram i figured out that you can hook up a meter between pin 4 on the diagnostic plug and ground. Set the meter to ohms if the meter reads 0 ohms then you have a short to ground. This lets you check the wire harness by moving it around and gives immediate feedback when you find the problem area without wasting a bunch of fuses. My problem was in wire that goes to the top of the motor and feeds the coil and injectors. About an inch above where it connects to the main harness on the left side of the front cylinder head. It had rubbed through the cloth loom tape and the insulation of the gray wire and shorted out on the plug wire. Easy fix after i found it!
Click to expand...

Hey starman! Thanks for this post! I found the exact same problem with my xb12r!
Was wondering what solution you came up with to fix this problem and how you made it easy.
From the looks of it I will have to tilt the motor forward, which I can and will do if it’s necessary...
Any tips would be greatly appreciated!
Cheers!
 
Jungle,I took the wire harness part way out of the retainer that runs along the inside of the left side of the frame/fuel tank. This gave me barely enough room to do the repair. In my case only the insulation on the gray wire was damaged. I used a seam ripper for sewing and removed the loom tape. Then I got a good wrap with electrical tape around the damaged wire, wrapped the wire harness with new loom tape giving it a few extra wraps for added protection. Then I reassembled carefully to keep the wire harness from rubbing. almost 10,000 miles and no more problems ... well at least with the ignition fuse:) Good luck and it helps to have small hands!
 

Similar threads

B
2008 Uly in need of service
Replies
1
Views
6K
Pushr0d
P
J
1125r Fuel Pump Fuse blows, even before the fuel pump should be priming.
Replies
1
Views
9K
Barrett
Barrett
R
2009 XB12R -Wiring Issue? Need Help
Replies
5
Views
8K
Barrett
Barrett
S
Ulysses not starting up
Replies
13
Views
5K
motoguy
M
J
2009 xb12 scg ecm smoking
Replies
2
Views
2K
Barrett
Barrett

Latest posts

Back
Top