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Home >> Ford >> 1994 >> Mustang V6-232 3.8L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Pinpoint Tests >> X - Constant Control Relay Module (CCRM) >> X177 - Check CCRM
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X177 - Check CCRM



- Key Off.

- Disconnect CCRM.

- Key On, Engine Off.

- Is fuel pump off with CCRM disconnected?

YES -- Key Off. REPLACE CCRM. RE-EVALUATE symptom.

NO -- Key Off. SERVICE Power-to-Pump/FPM circuit short to power. RECONNECT CCRM. RE-EVALUATE symptom.