It's in the underhood fuse box and labeled as F/ PUMP.
I personally like to backprobe the power wire to the fuel pump (large purple wire) as close to the fuel pump as possible and with the fuel pump connector plugged in. This will tell me three things.
1. If there is power than the fuses, relays, and wiring are correct.
2. If there is low voltage (less than battery voltage) there is extra resistance in the power supply wire. This could be a relay with dirty contacts or corrosion in the wiring.
3. Power is supplied to the pump for 3-5 seconds when the key is turned on. This lets me know the PCM is working correctly and receiving the crank signal from the ignition switch.
If all those check out check the ground circuit to make sure it is complete. Check for voltage on the ground wire while the pump is being powered up. If there is voltage on the ground circuit than there is resistance in the ground circuit which again could be corroded wires or corroded contacts where it meets the body.
I am pretty sure this one has a metal sending unit (the part the fuel pump mounts to. If it does and you reused the old one make sure the four wire connector that plugs into the top of the sending unit on the inside isn't burnt up. The pin that supplies power to the pump likes to burn up on these. I know it sucks that you already have it back together but if all of the above check out that is a possibility that needs to be explored. I would say that about 75% of the time the sending unit needs to be replaced because of this.
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https://www.6ya.com/expert/jeremy_d728a59f986299fa
FUEL RELAY OPPERATION CORRECT.
VOLTAGE AT FUELPUMP FUSE IN ENGINE COMPARTMENT(FUSEBOX) CORRECT. VOLTAGE AT FUELPUMP CONNECTOR UNDER BACK SEAT TOO LOW. WILL NOT ACTIVATE PUMP. THAT'S THE PROBLEM. SUSPECT BAD CONNECTION AT CONNECTOR PLUG SOMEWHERE.
Ok, if relay operation is correct as you say, does that mean it kicks on and sends out a signal? I'd check and see if my voltage drop wasn't occuring right there in the relay. It could be triggering properly, but still not providing ample supply.
If that measurement looks good, look for gummy bears and dried up Dr.Pepper in the floorboard from the Rugrats. Was the car ever appropriated for transporting Rugrats???
You're not shorting directly to ground, but you have spotted a voltage drop. Make sure you trace it from the front to the back. That means starting at the fuse, then relay, then wiring, then floor wiring, and the point you've measured low voltage. Measurements are never believable unless you and others can reproduce them.
Let me know what's up.
Let's fix this. Tater Todd
If you've arrived at that conclusion, please tell me how you got there. Just a little more detail if you can. Thanks. TT
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