Where is the pcm relay on a 2002 Ford Ranger?

The Powertrain Control Module (PCM) relay location on a 2002 Ford Ranger isn't a single, easily-defined spot like some other relays. The PCM itself doesn't *have* a dedicated relay in the same way some other systems do. Instead, the PCM's power is controlled through the main power distribution system, typically via fuses and the main power relay in the underhood fuse box.

To find the relevant fuses and relays:

1. Locate the Underhood Fuse Box: This is usually located in the engine compartment, often near the battery.

2. Consult Your Owner's Manual: Your owner's manual will have a diagram showing the fuse box layout and what each fuse and relay controls. Look for fuses related to the PCM, engine control, or ignition. There might be several, and their specific roles may vary slightly depending on your Ranger's options.

3. Check for a Main Power Relay: Many Rangers use a main power relay that supplies power to several crucial components, including the PCM. This would be a larger relay than the smaller ones for individual circuits.

Important Note: Working with automotive electrical systems can be dangerous. If you're not comfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic. Incorrectly working with fuses or relays could damage your vehicle's electrical system.