Power Circuits
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2002 Mercury Sable, 2002 Mercury Mountaineer, 2002 Mercury Grand Marquis, 2002 Mercury Cougar, and 2002 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Using a DVOM, check for battery voltage between ground and B+ circuit at PCM terminal No. 55 (104-pin PCM), or terminal No. A44 (150-pin PCM). See Fig 1 or Fig 2 . Turn ignition switch to START or RUN position. Check for battery voltage between ground and specified VPWR circuit at PCM harness connector. See PCM VPWR CIRCUIT TERMINAL IDENTIFICATION table. If battery voltage is not present, check for an open in VPWR circuit between PCM and PCM power relay. For additional testing procedures, see TEST B: EEC-V POWER RELAY under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article.
PCM VPWR CIRCUIT TERMINAL IDENTIFICATION
| Application | (1) PCM Terminal No. | ||
|---|---|---|---|
| Cougar | 71 & 97 | ||
| Models With 150-Pin PCM | A32 & A33 | ||
| All Other Models | 71 | ||
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