E9: Signal Ground 1 Continuity

With EM010 and EM014 disconnected, measure the resistance between EM010/023 and chassis ground EM008L

Is the resistance < 0.5 ohms?

Yes
GO to E10, E10: Signal Ground 2 Continuity

No
Inspect harness/connector EM010 for corrosion, damage, or pushed back pin.
Inspect ground stud EM008L for corrosion or damage.
Inspect harness/splice EMS36 for damage.
Repair as required and reconnect plug(s).
GO to E11, E11: Stop