DTC B1339: Device Power No. 3 Circuit Open: Description
Battery feed circuit (Orange wire) from fuse block INADV POWER BUS fuse (15-amp) to Natural BCM harness connector C4 provides power for interior lights. Voltage on this feed circuit must be 9-16 volts. If BCM detects that voltage on this circuit is less than 1 volt for 0.3 seconds, it will set a DTC B1339.
If conditions for malfunction no longer exist, current DTC will clear and a history DTC will clear after 100 consecutive ignition cycles. DTC B1339 will also clear when scan tool is used to clear codes.