I have a 5pin connector going to fuel pump I have a 3pin connector on New fuel pump, can i connect old 5pin connector to my 3?? 5pin pin has 2black,1blue,1green/black wires... 3pin has 1black 1blue,1green/black.

Here's a wiring guide for the fuel pump on a 2000 Cadillac Deville: 1. Remove the fuel tank and access the fuel pump module. 2. Disconnect the electrical connector from the top of the fuel pump module. 3. Locate the wiring harness that runs from the fuel pump module to the car's electrical system. 4. Cut the wires on the old fuel pump module connector, leaving enough wire to splice the new connector onto. 5. Connect the black wire from the new fuel pump module connector to the black wire in the car's wiring harness. 6. Connect the purple wire from the new fuel pump module connector to the purple wire in the car's wiring harness. 7. Connect the gray wire from the new fuel pump module connector to the gray wire in the car's wiring harness. 8. Connect the black/white wire from the new fuel pump module connector to the black/white wire in the car's wiring harness. 9. Connect the new fuel pump module electrical connector to the car's wiring harness connector. 10. Reinstall the fuel tank. Note that it is important to follow the wiring guide carefully to ensure proper installation and avoid damaging the fuel pump or electrical system. If you are unsure about any step of the process, it is recommended to seek assistance from a professional mechanic or refer to the vehicle's service manual.

It sounds like you have done some troubleshooting on your own and have determined that there is a problem with the power wire to the fuel pump. Running a new wire from the fuel pump power wire to the relay is a good solution if the original wire is damaged or burnt out.
Before connecting the new wire to the relay, it is a good idea to test the fuel pump by running a wire from the battery positive terminal to the fuel pump power wire. This will ensure that the fuel pump is working properly.
Once you have confirmed that the fuel pump is working, you can connect the new wire to the relay. It is important to connect the wire to the correct pin on the relay. In this case, you should connect it to pin 87, which is the power output pin.
It is also important to ensure that the wire is properly insulated and secured to prevent any electrical shorts or damage. Once the wire is connected, you can test the fuel pump by turning the key to the "on" position and listening for the fuel pump to engage.
If everything is working properly, the fuel pump should only receive power when the key is turned on, and the new wire to the relay will provide a reliable power source for the fuel pump.

If all three pipe were connected then you can't use the one with two

not reason why stated???????? fun, ?
the fuel pressure is over 60 psi, try not to get a bath in fuel.
right? there is no reason to this. (unless tank contam)
you can hot wire a pump with rear connectors pulled first
then measure rail pressures., (over 6 test there)

rule 1 , pump is fuel lubricated
rule 2 pump is fuel cooled.
do not violate 1 or 2, or you will burn it up., i promise!
the FSM is only 4 bucks. posted over 100 times here now.

https://suzukipitstopplus.com/Products/1135-2004-verona-service-manual.aspx

why send a link to a GM car? odd that.
to make links work have and enter key before and after the link
like mine..

ill actual look for you.
there is level sender and temperature pins and pump
the connector is C901
pins 3 and 8 are pump and is polarized
so dont power it backwards or boom.






pump


level and (pressure transducer)

If the connectors are wrong, it's the WRONG pump. Return it

gotta start with the color code of the wiring. verify that is correct first. you have to have fuel pressure for it to run obviously so make sure you wired it correctly. Here is the color code according to Mitchell OnDemand
black/orange= ground for fuel pump
orange/red=power on for fuel pump(only gets triggered from fuel pump relay)
dark blue/white= signal to pcm for fuel level
dark blue/ dark green= ref voltage

If that is ok then check for relay activation. Fuse 17 is the power source for that relay. If you have a good fuse but no relay activation you could throw a relay at it but if that doesnt do it then its gotta go to a shop. But if you are curious....
Relay code
pin 30= hot at all times
pin 86= relay control trigger from the pcm
pin 85= hot in run or start
pin 87= power source to fuel pump.(i.e. orange/red wire)

the relay will have numbers on it designating the correct pins. Get that right first then move on to the next. I'll be here. Good luck!

Just did my fuel pump on the 2001 isuzu rodeo. Well here is what you need to do about the different wire colors. First disconnect your negative battery. Drop the fuel tank and replace pump. Remember to have a splice kit in hand. Ok now here is how you connect the different colored wires. Black goes with black. Gray goes with black and orange wire. Purple goes wit blue and yellow. And the last wires goes together. I hope this helps.

REMOVAL & INSTALLATION

323, Protege, 520-22 626 and MX-6 and 522-24 MX-3 Models
See Figures 1 and 2

1. Relieve the fuel pressure and disconnect the negative battery cable.
2. If not already removed, depress the clips on each end of the rear seat cushion and remove the cushion.

Fig. Fig. 1: Detach the fuel hoses and electrical connections from the fuel pump, then remove the attaching screws and the pump

Fig. Fig. 2: Exploded view of the fuel pump assembly for the 323, Protege, 520-22 626, MX-6 and 522-24 MX-3

1. If not already done, detach the electrical connector from the fuel pump/sending unit.
2. Remove the attaching screws from the fuel pump/sending unit access cover and remove the cover.
3. Disconnect the fuel supply and return hoses from the fuel pump/sending unit.
4. Remove the attaching screws and the fuel pump/sending unit from the fuel tank.
5. Detach the sending unit electrical connector, remove the sending unit attaching nuts and remove the sending unit from the fuel pump assembly.

To install:

1. Attach the sending unit to the fuel pump assembly and install the nuts. attach the sending unit electrical connector.
2. Install the fuel pump/sending unit into the fuel tank with a new gasket and install the mounting screws.
3. Connect the fuel supply and return lines.
4. Install the access cover and the mounting screws.
5. Attach the sending unit electrical connector.
6. Position the rear seat cushion over the floor, making sure to align the retaining pins with the clips. Push down firmly until the two retaining pins are locked into the rear seat retaining clips.
7. Connect the negative battery cable, start the engine and check for proper system operation and for fuel leaks.

OK, let me help you with the diagnosis without having to do the "Fred Flintstone beat on the fuel tank" thing.

All you really need is a 12 volt test light and a LONG jumper wire.

Since you already know where the inertia switch is (red button in the trunk), this should be very simple for you.Connect one end of the jumper wire SECURELY to the NEGATIVE battery post. Then string the wire back to the trunk (we want to make absolutely certain that we have a known-good ground for our test lamp).
Then connect the cable end of the test lamp to the wire.
Disconnect the connector at the inertia switch. Using the probe end of the test lamp, probe Pin #1 PINK/BLACK (unfortunately, on your vehicle, BOTH wires are PINK/BLACK, so you know which pin to probe, pin #3 is the one that is not used - pin 31 is the one on the other end of the connector.)
Turn the ignition switch to the ON position. Your test lamp should light up for approximately 2 - 3 seconds then go back out. If it does, then you powertrain control relay, your fuel pump relay, the fuses for each of them and the PCM are functioning properly. If it does not light, let me know and we will go on to find out WHY.

If all of this is working, you most likely need a fuel pump. It IS possible that you could have a bad connection between the inertia switch and the fuel pump unit, but it is not very likely and you will have to pull the fuel tank to find out ....So, you may as well put a new fuel pump in if you are going to have to go through all of this anyway.

1. Relieve the fuel pressure and disconnect the negative battery cable.

2. If not already removed, depress the clips on each end of the rear seat cushion and remove the cushion.

3. If not already done, detach the electrical connector from the fuel pump/sending unit.

4. Remove the attaching screws from the fuel pump/sending unit access cover and remove the cover.

5. Disconnect the fuel supply and return hoses from the fuel pump/sending unit.

6. Remove the attaching screws and the fuel pump/sending unit from the fuel tank.

7. Detach the sending unit electrical connector, remove the sending unit attaching nuts and remove the sending unit from the fuel pump assembly.



To install:

1. Attach the sending unit to the fuel pump assembly and install the nuts. attach the sending unit electrical connector.

2. Install the fuel pump/sending unit into the fuel tank with a new gasket and install the mounting screws.

3. Connect the fuel supply and return lines.

4. Install the access cover and the mounting screws.

5. Attach the sending unit electrical connector.

6. Position the rear seat cushion over the floor, making sure to align the retaining pins with the clips. Push down firmly until the two retaining pins are locked into the rear seat retaining clips.

7. Connect the negative battery cable, start the engine and check for proper system operation and for fuel leaks.