Hi all, wondering if anyone can help me please. Was out for a ride last night when suddenly the bike just died on me. I noticed it had blown a 20a injection relay fuse. Replaced the fuse and blows it as soon as I turn ignition on. Also I can’t hear the fuel pump priming?? Any help much appreciated, many thanks Clint
Would appear you have a short circuit. Check the loom for chaffing, particularly under the tank area.
I'm not electrical guru by any means (as you'll tell in a moment!), but you must have a short somewhere in that circuit allowing the current to flow to earth via the fuse unimpeded. Therefore the electrons go 'Yea, come on lads, there's an easy path out of here!' and they all pile out at once and blow the fuse. First check the obvious things like loose wires touching metal, chaffing of the insulation exposing bare wire, corrosion build-up on connectors etc. After that it's out with the multi-meter to test connectivity between each run of the feed wire till you find the location of the short. I've had to do this on numerous occasions during the restoration of my Ducati Single and it's crap 1950s electrical components and it just confirmed my loathing of all things electron related . I'm sure someone with far better knowledge will be along shortly to be of more help. Best of luck.
If you disconnect the fuel pump, (I'm assuming there is an electrical plug on the fuel pump, under the tank) see if that stops the fuse blowing. If it doesn't then you say there is a relay controlling the pump, remove that relay & again see if the fuse stops blowing. After that, depending upon your level of competence, you need to visually check all the wiring loom very carefully looking for signs of damage/burning/chaffing/etc. Around the steering head is a good place to start and anywhere else wires are near moving parts. Ideally if you can get a wiring diagram for your model that will be very helpful in fualt finding too.
I’d start with your alternator. Disconnect and check... There’s loads of short circuit potential here....
I had the same thing happen on my old Hayabusa a few years ago, riding then suddenly it died. Replaced the fuse and same thing happened. Got it recovered back home and replaced the fuse again, turned the ignition on and as the fuse popped I noticed out of the corner of my eye a tiny bit of smoke from under the seat fairing. Stripped the seat fairings off and found that part of the wiring loom had chaffed through and was shorting onto the subframe which was causing the fuse to pop. I repaired that and used tie wraps to secure the loom more thoroughly to the subframe to prevent any more chafing, didnt have any more problems after that.
Many thanks for all your reply’s. I had quick look earlier to see if there was any evidence of chafing, couldnt see anything obvious. I will have a good look over it tomorrow after I source some more fuses ♂️
Wishing you the best of luck mate. If you can, look at a wiring diagram of what that fuse is connected to, you should be able to narrow it down quite a bit to certain bits of wiring so you dont end up looking at wires that arent associated with that fuse. Look behind the wiring too in places where anything can rub, and look for evidence of shorting on any parts that the wiring touches particularly metal parts.
Just a little update..... checked all the wiring under seat and tank, couldn’t find any chafing, was quite surprised how tight the wires are crushed in between the rear frame and outer plastic. Put it back together and still popping fuse. I then pulled out the 2 relays above the battery, put them back and now it’s working and not popping the 20a fuse??? Not sure what to think, or why this is ?? Can anyone tell me what those relays are doing?? many thanks
Run for about 20 secs, then blew the fuse . Hi Bettes, that could be it... I’ll check and make sure wires aren’t pinching under the relays tomorrow. Where did you get that info from? Could this be a common problem with panigale’s?? Many thanks
Hi and you’re welcome. I’m crap with computers so I’ll try to link the thread where @LiveFast...... put the workshop manual. https://drive.google.com/file/d/1oovvHarMWkPaVNsF-h81WJpwkCZ7leyI/view?usp=drivesdk
Do you have access to a multimeter? The fuse box has a supply side (from the battery) and a feed side. Check for continuity between the feed side and earth. If there is continuity then you have a short somewhere on that wire. It is then a case of tracking the wire until you find the short.
Hi Chrisw, please forgive if I come across as being really thick... not my strongest subject So the 20A fuse has a red and brown wire going to it. I presume the red is a supply and the brown is a feed which I think is going to a relay. Ive got a multi meter, and have just checked for continuity between the brown and the earth spade on the back of the fuel tank, there was no continuity. But I then tried the red side of the fuse to the same earthing point and I do have continuity.... is this right ???? Many thanks for your help
Stick your meter on Volts and identify the supply side (you will get +12V). You want to check the other side as this feeds the relays etc. Put the meter in Diode mode >|- The display should show ‘1.’. Check from the feed side of the fuse box to the -ve battery terminal. If the reading shows anything other than ‘1.’ then you have a short circuit.
