Power Circuits
WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition on. Check for battery voltage between ground and PCM connector terminals No. 66, 71 and 97 (Black/White wires). If battery voltage is not present, power is not being supplied from PCM power relay. See TEST B: PCM RELAY under SYSTEM TESTS in SELF-DIAGNOSTICS - VILLAGER article.