| Author | Message | ||
     Kickastro |
I have a 2009 XB12X that was misfiring one cylinder upon startup. I changed both plugs to Iridium but now when I go to start the bike, a 15A fuse blows (2nd back from front-right side of fuse block) whenever I press the ignition button. The fuel pump is working fine as well as the gauge array, turn signals, and running lights. I checked for frayed wires, but can't seem to see any wear? Thoughts? | ||
| Terrible1one3 |
I would check the plug wires themselves if you haven't already. You could have possibly damaged them when you replaced the plugs, or they were already damaged and the movement made them worse and they are shorting on the frame. | ||
| Froggy |
That is the key-switch fuse that is blowing | ||
| Kickastro |
Thank you, any one have a part number and dealer contact for the Magnacor wires? I appreciate it greatly. | ||
| Garrcano |
I got the Magnecor 8mm #2022 on an eBay shop in UK | ||
| Natexlh1000 |
How could bad plug wires blow a fuse? | ||
| Mnrider |
Sounds like you may have shorted the coil power wire. | ||
| Ratbuell |
Did you take the airbox off? Take it back off and make sure you didn't pinch any wires putting the baseplate back on... | ||
| Swampy |
Clean your grounds, especially the one under the air box between the engine and the frame. | ||
| Kickastro |
Thanks everyone, I will attempt to clean the grounds and check once again for pinched or frayed wires. | ||
| Kickastro |
Ok, I am still blowing the Key Switch fuse every time I try to crank the bike over. I have replaced the High-Tension leads with Magnacore plug wires, sanded the main ground and connectors, as well as the ground near the coil, as well as the ground just behind the forks. I have switched batteries. I have looked for frayed wiring etc. I even tried bumping the fuse up to a 20A and it blows as well. One thing to consider is that during the initial plug swap, I charged the battery up using a 12Amp charger that may have been intermittently set to 30A while the battery was still connected to the bikes wiring harness. Another thing to consider, is that for the last year my bikes starter would occasionally skip engagement and whine very loud upon the occasional hot-restart. Any ideas on what to try next? Thank you immensely. | ||
| Brighton |
Natexlh1000's and Mnrider's posts sound like the place to start. Possibly the coil is bad with an internal short, primary winding shorted to secondary winding. Or maybe the input to the primary (from the battery) is shorted to ground somewhere before it connects to the coil. | ||
| Mark_weiss |
Pull all of the fuses and unplug as many components as easily possible. Replace the key-switch fuse an turn the switch on. If the fuse pops, only the circuits left active could be the culprit. If the fuse holds, replace the fuses one at a time and see if a particular circuit is the culprit. If all is still ok, start reconnecting components until you find the branch with the short. | ||
| Reepicheep |
They make little circuit breakers that could be jury rigged in place of the fuse while you are debugging... I keep a few around for some of my old bike re-wiring projects. They are at your local auto parts store. | ||
| Etennuly |
is that for the last year my bikes starter would occasionally skip engagement and whine very loud upon the occasional hot-restart. Any ideas on what to try next Check very closely for loose or broken wires to the starter from the ignition switch. With the problems you had there this is a logical place to look for your ignition fuse popper. | ||
| Arcticktm |
If you get this figured out, might want to reconsider your charger, too. Unless you meant 1.2 amp, a 12 amp charger is way too much for a cycle battery. No point in fixing this and then frying your battery! Good luck. I with Ettennuly if the coil checks out. | ||
| Ks_jetta |
I had an intermittent short to ground on a Pontiac Fiero coil back in the day. What a royal pain to diagnose. I replaced everything else in the ignition system and an old parts guy told me to try a new coil. Bingo - problem solved. Fast forward 30 years and I diagnose an old 1968 2 ton truck having similar issues by putting a timing light on the coil lead and seeing periods of no trigger. Replaced the coil and problem solved again. Bottom line - I don't trust coils...  | ||
| Tootal |
I had a coil actually melt the solder out of an ignition module! Replaced the module only to have the new one fry! I love the idea of pulling all the fuses to check the systems. Great troubleshooting method! |
