Fuel pump no power
 

Baja 232 w a 502 mag mpi.
I am getting 1.4 volts to pump. It’s not turning on. When I turn the key I don’t hear the beep along with pump turning on. I just put 2 brand new harnesses in it this weekend. My pump relay has 12v and the grey wire only has 1.4 I would think it would be much higher. Pump turns on if I hook it straight to 12v. Also not sure what these wires are for. I didn’t have them on my old harness.
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Motor serial number?

502 Mag MPI HJ 1996–2001, 6HJ

is there a grey cap on a plug with 3 fuses inside one is for the fuel pump ? if this an OE wiring harness

Yes grey plug has a cap

1996 to 2001 goes across 2 manuals, not a lot of help

The single wire Blue/Tan (if it is tan) would be for transmission over temp (you don't have)

2 prong connectors
Unknown because unable to find anything in diagrams using those colors at rear of motor

Note fuses 15, 16 and 17
The fuel pump has a ground and Gray going to power up when relay energizes.

Ignition ON, supplies power to MPR. The MPR contact gets power from the engine circuit breaker thru a fuse and Red wire. The MPR is energized via the engine harness to EFI harness thru a pink wire

MPR supplies power to ECM and fuel pump relay contact. FPR is energized by the ECM thru the Green/White wire

Since your not getting a beep, then the beeper may not be connected and/or your not getting power to the ECM


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Wires are the same but would probably have all 3 fuses under one cap 13

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Has all three fuses under box. Relay is getting 12v through pink wire. Grey wire is only getting 1.4v. What is MPR?

Main Power Relay

How do I check that?