If you're experiencing fuel pump issues, the problem is likely one of the following:
* Failed Fuel Pump: This is the most common culprit. The pump itself may have worn out or burned out. Replacement is required.
* Fuel Pump Relay: This relay switches power to the fuel pump. A faulty relay will prevent the pump from working. This is a relatively inexpensive and easy part to replace.
* Blown Fuse: Check your fuse box for a blown fuse related to the fuel pump.
* Wiring Issues: Damaged or corroded wiring can interrupt power to the pump. This requires tracing the wiring harness for breaks or corrosion.
* Low Fuel Level: While not a "reset," ensure your tank actually has enough fuel. The pump may struggle to draw fuel from a very low level.
* Fuel Pump Pressure Regulator: This component regulates fuel pressure. A faulty regulator can cause issues that mimic a pump failure.
* Inertia Switch: Some Cherokees have an inertia switch that cuts power to the fuel pump in a collision. Check this switch to make sure it hasn't been tripped. It's usually located under the dash or in the engine compartment.
Troubleshooting Steps:
1. Check the Fuel Level: The simplest thing to do first.
2. Check the Fuel Pump Relay: Locate the relay (consult your owner's manual or a repair manual for the location). You can swap it with another relay of the same amperage to see if that solves the issue.
3. Check the Fuel Pump Fuse: Again, consult your owner's manual to locate the relevant fuse.
4. Listen for the Fuel Pump: When you turn the ignition key to the "ON" position (not starting the engine), you should hear a brief hum from the fuel pump. If you don't hear it, the pump, relay, or fuse is likely the problem.
5. Check the Inertia Switch: Locate and reset this if equipped.
If you've checked all of these and still have issues, you'll likely need to have a mechanic diagnose the problem further. They can test the fuel pump's output pressure and check the wiring for continuity. Replacing the fuel pump usually requires dropping the fuel tank, which is a more involved process.
