That gray wire is the fuel pump power supply . You cut the wire were an positive tested it ??? An what does that mean . you positive tested it ? Wish you people would learn to talk like a mechanic would ! If you cut the wire near the relay an checked with a ohm meter or a test light with B+ volt , of couse it going to show ground ! It's going through the fuel pump windings to ground on the other side . What fuse keeps blowing ?ECM B - 20 amp ? This powers the fuel pump as well . May not even be the fuel pump circuit blowing the fuse . You need to find everything that fuse powers and isolate the different circuits . Videos on youtube showing how to find a short .
SOURCE: fuel pump problems 2003 s10 chev 4.3 v6
Your ECU is what acctivates your fuel pump realy. Put the key on the run possition and pull the ecu fuse for a few seconds and reinstall it ans it should accivate your realy for 5 seconds, Good luck.
SOURCE: 2000 S10 4.3L
At the fuel pump relay you should have 1 full time hot wire. 1 hot wire when you turn on the switch. 1 ground, and the other wire goes to the pump. Test the ground to be sure it is good. If so then jump a hot to the one that goes to the pump and see if it runs.If it does then you have a bad relay or ECM. You can swap the relay with another of the same # from tour fuse box to test it.There is also a ground on top of the frame near the filler neck, check it too. Good Luck
SOURCE: 2000 chevy venture doesnt start
Not the IAC, or MAF, or 02
Does the Van Crank over?
Have you checked the IGN Relays? 1,2,and 3?
How did the Battery test out?
Anything below 11.9v battery is dead.
So I suggest that you do not throw any more parts and check the battery again.
SOURCE: no fuel to the throttle body i have replaced the
It could be the power wire to the pump. Try running a power wire from the battery to the pump. It should turnm on for a few seconds and shut off until you start the truck. Hope this helps.
SOURCE: 1997 Suburban, cranks, won't start. Removed fuel
The oil pressure gauge on the engine runs the fuel pump until the engine receives full oil PSI and shuts off. Upon that time the relay takes over for the fuel pump
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