Sir Nissanpowerhouse . . . . . . ( possibly . . . . now being Nissanpowerlesshouse )
WELCOME . . . . . . to Electronics Point and sometimes Gas Monkey Garage . . . .
I have noticed the fuel pump will only run when the relay us bridged.
And is it actually still pumping fuel now ? ( The car will run )
USING REFERENCING BELOW . . . . .
FIO . . . . Relay # I I normally is in the right contact position leaving no power connection to the fuel pump.
Then with an ignition switch turn on, the other contact position (as is shown) routes power to the fuel pump via BL to R/BL.
YOUR mentioned relay is being read as RELAY # I in the wiring referencing, when bridging, you are simulating it having its BL/W to B contacts closed ..
Then IF all is well in the ECM it will permit lower B wire on the FUEL pump , get connected to BL/W wire of the relay.
THEN IF relay # I has 12 V across its O to BL coil the relay contacts should close from BL/W to B and let the pump have power.
Now, do you have 12 V across the O-BL coil of relay # I ?
Tell us how
LONG OF A TIME that you needed to run that pump to do your task.
Looks like a case of using a temporary duty item for a continuous duty application and possibly overheating, all the way to its demise.
Typically, you step in the car and turn on the switch and the pump does a quick thumpa-thumpa to ramp up to pressure and the associated pressure switch internal of the fuel pump, then turns off the unit.
Then as your fuel demand depletes the static fuel pressure, that causes the pressure to drop down to that pressure threshold where the switch closes and takes a THUMP or two to come up to full pressure again.
Now you had that unit continually running into a non pressurized condition and progressively heating up. . . . . to be or not to be damaged ? ? ?
Wiring Info . . . . .
View attachment 45567
73's de Edd . . . . .
Saved me some good money, big time, this year, by buying our Halloween candy at Aldi's.
I just hope the kids like Skattles and 4 Musketeers.