Can you run the fuel pump without engine running on a 1998 explorer?

No, you should not run the fuel pump on a 1998 Ford Explorer without the engine running for an extended period. While you might be able to briefly activate it with a direct wire connection (and this is generally NOT recommended unless you know exactly what you're doing), doing so for any length of time is risky:

* Overheating: The fuel pump is designed to be cooled by the fuel it pumps. Running it dry can cause it to overheat and burn out.

* Damage to the pump: The pump relies on the engine's system to maintain pressure and provide lubrication. Running it independently could lead to premature wear and tear.

* Fuel pressure issues: Without the engine's computer controlling fuel pressure, you risk causing erratic fuel delivery which could damage other engine components.

If you need to test the fuel pump, you should do so according to the manufacturer's specifications or a reputable repair manual. This usually involves using a fuel pressure gauge and testing the pump's operation *within* the normal operating parameters of the vehicle's fuel system. Improper testing can lead to damage and increase the chance of fuel leaks.