Power Circuits

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

⁽¹⁾	For PCM harness connector terminal identification, refer to illustration. See Fig 1 or Fig 2 .

Fig 1: Identifying PCM Harness Connector Terminals (104-Pin)

Courtesy of FORD MOTOR CO.

Fig 2: Identifying PCM Harness Connector Terminals (150-Pin)

Courtesy of FORD MOTOR CO.