Pinpoint Test QB: DTCs P0603 or P1633: Keep Alive Power: Introduction: Notes

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This pinpoint test is intended to diagnose the following:

Battery terminal condition.
Keep Alive Power (KAPWR) wire routing.
Harness circuit: KAPWR.
Powertrain control module (PCM) (12A650).

Fig 1: Keep Alive Power Circuit
Courtesy of FORD MOTOR CO.