Question about 1995 Dodge Caravan

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Fuel pump has no power

Pump fuse is good. fuse has power in. fuel pump relay was replaced. what would stop the power supply?

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  • mike loshbough
    mike loshbough May 11, 2010

    the auto shut down relay should be checked

  • yadayada
    yadayada May 11, 2010

    go to alldata.com and purchase a wiring diagram and find out the source of fuel pump relay power, I would guess a defective ignition switch.

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  • 5 Answers

Check the fuel pump ground, and the wires leading up to it.

Posted on Feb 24, 2009

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Vehicle motor turns but not fuel supply


You don't say if you have checked that the Fuel Pump is working.

1. You need to check that the fuel pump is operating and getting power.. Have someone turn on the ignition (but not start the engine) If you listen near the FP location you should hear the fuel pump run for 3 seconds and stop. If in doubt do this a couple of times until you can hear the pump run and stop.

2. If you cannot hear the pump running check the fuel system related fuses.

3. If the fuses are good check that the relay for the fuel pump you replaced is functioning. Have someone turn the ignition on and off a few times and listen for the click from the relay or put your finger on it.

4. As a final check have a simple fuel pressure test done on the fuel system if not done already. . If everything is running normally and you are getting good fuel pressure then the starting problem will be somewhere else.

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If you are trying to diagnose your fuel pump circuits, it is necessary to use a scan tool that has vehicle-specific capabilities and can access fault codes and live data from both the the Powertrain Control Module (PCM) and the REM. Two-way communications and actuator testing is also necessary for certain tests involved in verifying the fuel pump circuits.

The easiest way to verify whether the entire system is working or not would be to check for the proper voltage (over 12.5 volts) at the Fuel Pump Module (FPM) electrical connector. If the correct voltage is present at the FPM connectors, then the fuel pump relay, the REM, and all related fuses are good. However, to do this, once again, it requires a scan tool as described above so that the fuel pump can be commanded ON through the computer system functional tests.

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Hello

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Okay, lets assume that checks out fine, the next thing to do is replace the fuel pump relay and ground the dark blue wire. You should hear the fuel pump running. Okay? Good, now go to the PCM located on the firewall in the engine room. It has three large connectors, black, white and grey. There is a DB wire in cavity 19of the grey connector. Ground this wire and you should hear the fuel pump running. If it does then the wiring for the fuel pump circuit is all good and the PCM will need to be replaced. If it doesn't run, then you have a problem in the DB wire between the relay and the PCM.

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apply power and ground directly to the fuel pump

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