[Paul Workman]

Originally Posted by Chris26

FYI The pump was not under load when tested(connected to injectors and rail).....

Just to be sure we're on the same page....

The connector at the fuel pump (for the record) is "C450"

With all circuitry connected normally, AND that includes the fuel lines to the injectors via the fuel rail(s), WITH the battery (pos) is passed through the VOM (configured to measure Amperes) to the FUEL PUMP PRIME CONNECTOR (the red wire/connector near the windshield wiper motor, jutting out of the big wire loom), you should read between 8 and 10 amperes (approx 1/2 of the current to each pump, is how that works).

However, if the current is NOT where it should be, by pulling the FP1 fuse you cut off the current to the FP1 circuit and what is left is the current flowing to FP2 only. Now, if FP2 is normal, under load (pumping fuel) it should read between 4 and 5 amperes.

CHECKING OUT THE HARNESS TO THE FUEL PUMPS:

With C450 disconnected (at the fuel pumps), separating the harness from the fuel pump apparatus, the ignition switch still in the OFF position, and the FUEL PUMP PRIME CONNECTOR no longer connected to anything, and all other connections, etc. in their normal condition/state (i.e., no jumpers or whatever else being present), the VOM configured to read resistance should read zero to 1 ohm or there 'bouts between the GRAY and the DARK GREEN/WHITE (harness) wires (feeding from the battery-side of the C450 connector, NOT the wires leading into the tank).

Again, reading resistance of the ground connection, the resistance measured between the BLACK wire (on the harness side) of the C450 connector and ground (e.g., the frame) should be very close to zero to 1 ohm (i.e., the amount of resistance one reads when the test leads are shorted when measuring ohms).

IF the above is true, i.e., the resistance reading recorded between the GRAY and the DARK GREEN/WHITE (harness) wires was at/near zero, AND the resistance between the BLACK ground wire of C450 of the harness is at/near zero, the harness "ohms out" FOR NOW.

Let's hear what you find/found.