Recently purchased a 2002 cbr600f4i for my wife, she ran fine, I was checking all wires and fuses and the fuel pump stopped priming...I’ve read thru this forum several times and I’ve discovered and learned many things. Changed out the fuel pump relay, but before that I could prime the pump by putting my test lead on the red and white wire going into the relay and was able to cycle the fuel pump like that, now it won’t cycle at all. And it’s getting very frustrating. Only way I can get the fuel pump to cycle is by putting my test light on the bigger brown wire coming out of the relay next to the fuel pump relay....please help she just wants to ride as do i
i am not sure how to check the bas and I’ve jumped the red and green wires as read in these forums...is that supposed to bypass the bas and trigger the fuel pump?

 

For the BAS yes to bypass you jump the red and green (the two outside wires) If the BAS is faulty and not letting the bike start, jumping the BAS will let it start. If you already tried jumping the BAS with no difference than its probably not the BAS
Not sure if I am understanding correctly but the fuel pump does not prime after replacing the fuel pump relay? what happens if you put the old one back on?