k75rt has no power to fuel tank

[webby]

have started a restoration the bike has been stored 14 years have replaced pump and fuel level and filters and new battery every thing else seems fine relays and fuses engine is turning over fine but there is no power going to the fuel tank the abs is flashing a warning as have not sorted brakes yet as thought I would start with engine first have checked the connectors under tank and cleaned. the bike has been very well looked after and stored in garage and was serviced a month before being stored then owner was taken ill  any idea thanks

[Scott_]

Check any of the other electrical connections for oxidation and such, especially the large multi-pin connector at the jetronic controller.
You may also want to check the relays in the relay box, to make sure their contacts are clean and are seated in the sockets tight.
The fuel pump only gets power as the motor is turning. Possibly the HES sensors aren't sensing rotation to have the jetronic unit send signal to the pump relay.
You could try and power the pump directly with some jumper wires just to make sure you don't have a bum pump(even if it's new it can be bad).

[webby]

Thank you for your reply will check that and see thanks webby

[K75RT Keith]

So what was the outcome?  Did you have a loose connection or other issue?

[webby]

have checked all the wiring and connectors have been cleaned have checked the injectors where taken out cleaned  they all work and checked spark plugs they have been changed and they all power up  I took tank to a bmw bike shop near me and he tested tank and all seems good and worked fine ive ordered relays and will try them out when they arrive and post results thanks webby

[webby]

parts came yesterday changed relay and ecu  and no difference  the only thing not been checked is the hall sensor which was mentioned earlier can this be checked or is this a garage job as don't think there is much more I can do thanks webby

[Scott_]

If you are getting spark at the plugs when the motor is turning then I don't think you HES sensors would be bad, as they also trigger the spark timing.

When you say that you took the tank to a shop, they checked the pump using the tank side of the pigtail connector, right? Have you check the bike side of that connection? That 4 pin connector has had a history of going bad.

[webby]

thanks for your reply the garage checked tank wiring that's all good the 4 pin connecter on the bike has no power on the yellow wire have changed relay and fuses also tried different ecu box on top of battery still no joy have cleaned injectors and renewed spark plugs and cleaned earth leads and cleaned every connections I can see still no power to that yellow wire the bike was stored after just been serviced stored due to illness not because of problems only has 8000 miles on it is it worth by passing the connector block?

[Inge K.]

thanks for your reply the garage checked tank wiring that's all good the 4 pin connecter on the bike has no power on the yellow wire

The yellow wire is the signal to the fuel guage, power to the fuel pump is the green/white wire.

If you don't have any power (for a couple of seconds when pushing the starter button) at this wire,
measure at fuse 6....which is earlier, along the same path.

I would guess that your FI relay don't receive a ground signal............

[webby]

when I connected the tank back up to the bike after having it tested there was no petrol being pumped through  that's why I thought the yellow wire was for the pump as it was dead if no power going through that wire would it switch power of to the pump?

[webby]

Put tank on another bike and pump worked fine so the tank side is all ok it is something to do with bike side ?

[webby]

thanks for everyones help I now have power to the tank there was an issue with the plug connectors thanks once again webby