D5: Check Harness Short Core to Core

Measure the insulation resistance between EM012/001 & EM012/002
Repeat this test for pairs EM012/002 & EM012/003 EM012/003 & EM012/004 EM012/004 & EM012/001

Is the resistance > 10M ohms?

Yes
Go to D6

No
Inspect EM012 & PI034 for corrosion, bent/pushed back pins or locate & repair the harness/connector (PI001)
Go to D9Z