B6: Check Signal Continuity

With connectors FC025, FC026 and BT008 disconnected measure the resistance between FC026/013 and BT008.

Is the resistance < 0.5 OHM?

Yes
Go to B6

No
Inspect harness/connectors/pins FC026, RH001/013, BT002/017 and BT008 for corrosion, damage, bent or pushed back pins. Repair as required and test the system for normal operation.