Pinpoint Test Purpose
WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
To determine the root cause of the voltage fluctuations. This test verifies the PSCM fuses, PSCM wiring harness power and ground connections are working correctly. It also verifies if the PSCM is receiving the proper voltage from the battery and charging system.