No power to fuel pump

GERTY

MEMBER
2004 MITSUBISHI LANCER
4 CYL
2WD
MANUAL
118,000 MILES

The car died, no fuel. I have checked the 15 amp fuse under the hood -it's good. The 7.5 amp fuse under the dash is also good. I tested both the #1 and #2 fuel pump relays under dash-they are good. The pump runs fine with 12v applied to it. The issue is this: When testing the relay sockets under the dash for voltage, I have 12v into #1 relay with key on- it completes the circuit and sends 12v to #2 relay. However I can not get the second relay to close as I do not have ground at the other side of the coil on the #2 relay. According to the diagram, ground comes from a transistor (violet wire) in the ECM for the second relay. My question is do I have a bad transistor in the ECM or does some other sensor or system need to send a signal to the ECM to allow the ground to be sent back to the #2 fuel pump relay? What else should I check?

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3 Replies

GERTY

MEMBER
2 POSTS

Update! I did ground the violet wire and with the key on the fuel pump runs. I don't know if this indicates a bad ECM or if some other sensor has failed not allowing the ECM to send ground to the fuel relay or start. The car will not start even with the pump running. Any thoughts? I will attempt to get a scan tool to pull any codes.