The fuel pump relay location on a 1999 Ford Windstar is in the
Power Distribution Box (PDB), often called the fuse box under the hood. However, it's
not a dedicated fuel pump relay like some vehicles. Instead, the Windstar uses a circuit within the Power Distribution Box controlled by the Powertrain Control Module (PCM). There's no single relay you can simply replace.
If you're having fuel pump issues, you'll need to diagnose the problem using a multimeter and possibly a scan tool to check for PCM codes related to the fuel pump circuit. A mechanic with access to diagnostic tools will be best equipped to find the specific issue within the power distribution box's circuitry. Simply swapping relays will likely not solve the problem.
