H19: Check Harness Short to Ground

With EM010, EM012 and EM024 disconnected, measure the insulation resistance between EM012/016 and ground EM010/023.

Is the resistance > 10 Mohms?

Yes
GO to H20, H20: Check Harness Short Core to Core

No
Inspect harness/connectors EM012, EM024 for corrosion, bent/pushed back pins. Repair as required and reconnect plug(s).
GO to H21, H21: End