H20: Check Harness Short Core to Core

Measure the insulation resistance between EM012/016 and EM012/022.

Is the resistance > 10 Mohms?

Yes
Reconnect all plugs.
GO to H21, H21: End

No
Inspect harness/connectors EM012, EM015 and EM024 for corrosion, bent/pushed back pins.
Repair as required and reconnect plug(s).
GO to H21, H21: End