I have a 2001 F4i. It had a problem with the speed sensor so I decided to replace it. The bike starts and run fine before I started the work, the only problem was the speed isn't showing.
In doing so, I need to remove the fuel tank. Everything went pretty smooth, but after I put everything back together. The bike won't start and the fuel pump isn't priming.
When I switch on the run switch, I could hear the fuel relay click. The F1 light turn on for about a second and then turn off but there's no fuel pump priming sound.
What I had tried so far for trouble shooting:
1) I put the old speed sensor back -> doesn't help at all
2) I found a copy of the service manual and looked into error code -> I think a long (1.3) sec F1 light means 10 blinks. But there's no error code 10
3) I used a multimeter to test the weird. The tip sensor voltage is correct. I also tested the fuel pump 3P connector. When measuring green (right most) and brown-black(center wire) there's 8-10V constant. when measuring green and brown(left most) wire, there's 12V for a couple second when I turn on the run switch. So according to the service manual, I should replace the fuel pump

Is replacing the fuel pump the only recourse at this point? I haven't even touch the darn thing, how could it be broken?

 

good measurements and data!

next step is confirm fuel-pump is really dead. Using tiny insulated alligator jumpers apply power & ground to pump directly

does pump run?

 

Lemme try that tmr.
I think the green wire on the fuel pump is ground and the brown wire is positive right?
Do I basically just hook the positive/negative of the battery to brown/green of the fuel pump connector?

Thanks

 

Yup! If pump runs when power+ground applied it's good! Seems it can't possibly fail just because tank was removed and re-installed.

There's possibility that connector to pump got damaged somehow. Terminals inside it bent? Terminals of pump bent?