Hi All, Over the last 2 rides the petrol pump kicks in when I've got home and the ignition is turned off. The only way to stop it is to start /stop the bike. Even then it can cut in minutes later - with the ignition off. Any help please? Regards, Mark.
maybe time for a new fuel pump relay, usually they stay in the open position(bike won't start) when they break down but seems yours stays in the closed
with ignition off can you also turn the starter over when pump runs on it's own? (obviously clutch in/sidestand up etc depending on which bike you have?)
No voltage to the coil but the supply will be direct (via a fuse) from the battery, so if the contact sticks then the fuel pump would stay activated.
I agree with the above. The fuel pump relay may be the easiest to check (and cheapest to fix). ignition relay or ignition switch may be worth checking too. Definatley sounds like a switching problem of some sort. Electrical gremlins can be frustrating, but there's something strangely satisfying about tracking them down with a multimeter
The relay is only a switch operated by the ignition, it will be live all the time only passing current to the pump when switched by the ignition. As suggested it could be sticking on. Steve
Thanks all for your replies. It's big strip down and check everything after end of October & SORNED for winter. It's 10 years old this year so needs all the electrical connections checking and cleaning & replace all the relays and fuses. Any other items to replace while it's stripped? Regards, Mark
If your bike is 10 years old, so are the relays! I really don't know why Ducati don't replace them as part of the main service for the sake of a couple of quid each. It would stop issues like this where bikes break down due to relays sticking. Madness.
The last "Ducati" service on this bike was in January 2008 @ 3353 miles. It's done another 10k since then. I feel it's not broken down, as much as developed a fault. Everyone can ask the dealer to clean connections & change fuses/relays during a service. I find bikers - especially Ducati owners, have more of an awareness of technical bits and the requirement of what needs to be done to keep them from developing faults. Prevention is better/cheaper and less of an inconvenience than cure. That's why its now time for a big strip down and check this winter.
from memory, this is the relay that is mounted upside down essentially so more prone to taking on water? Phil (Ghost) said that he put his in a disposable glove finger (cut off) together with a fair dose of silicone grease.
I believe the modern Ducati relays are completely sealed unlike the o.e.m ones, so don't need sealing. One potential problem sealing things inside fingers of rubber gloves is they can get condensation inside which then can't dry out naturally. Best thing to do with aforementioned relay is to move it from it's original position to a new home just above where it lived originally. there is a rubber holder there begging to be used, and the relay will now be orientated in spade connectors down position.
glad you posted John - if you had found it earlier it would have saved my (limited knowledge on the subject) input
