Q: No fuel to the fuel rails. Replaced battery (it was bad).. I'm trying to determine if the FPDM is bad or the fuel pump is bad

asked by

Eddie E

on October 15, 2016

I couldn't find any pin layouts with correct voltages for the different color coded wires and pins... I am going by color coded wires because I don't know which pin is pin #1 (as I said I can't find any schematics or layouts for the pins and their proper values) So I made some measurements from ground to pins with the FPDM completely disconnected from the connector to the fuel pump. I haven't yet plugged it into the fuel pump and made measurements while its in circuit. It is putting out voltages and some seem odd as there is a obvious 12 VDC line that isn't reaching 12VDC. (Yellow / White Stripe) that reads 11.28 VDC and when i attempt to start while engine is turning over the voltage at this line (Yellow / White Stripe wire) drops to 10VDC... I would like to know if you can find a pin layout which pins or wires by color code go to the actual pump so I can put 12VDC directly to the pump and see if it builds pressure. Thank you for your time. FPDM part# YF3F-9D372-AA

pump part# ?

My car has 123948 miles.
My car has an automatic transmission.

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Q: No fuel to the fuel rails. Replaced battery (it was bad).. I'm trying to determine if the FPDM is bad or the fuel pump is bad

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