Here is a guide that will help with this:
However, if the engine starts on fluid and no power to the pump then we need to trace down where the power went.
This is going to get confusing as you have 3 relays involved, one feeding the next so here is the process going backwards through the system from the pump.
So the pump is feed from the Blue/red wire on the fuel pump relay. When the ECM wants this relay on, it grounds the green/red wire and it closes the relay to send power to the pump.
However, the relay gets the power from the green/white wire from the circuit opening relay. This relay gets it voltage from the ignition fuse and is again grounded by the ECM on the green/yellow wire. When it is grounded the relay closes and sends power it gets on the Black/red wire from the EFI relay.
The EFI relay get its voltage sent to it from the ECM to close the relay on the black/orange wire. Once it is closed it sends this voltage on the Black/red wire to the opening circuit relay. The EFI relay gets the power from the EFI fuse so we need to check that as well.
Please see the wiring diagrams below but we need to check these relays and fuses as well.
Let us know what questions you have. Thanks
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Tuesday, May 4th, 2021 AT 3:41 PM