Possible Causes

ATTEMPT TO COMMUNICATE WITH THE BCM

FUSED B(+) CIRCUIT OPEN

GROUND CIRCUIT OPEN

LIFTGATE OPTICAL SENSOR SHORT TO GROUND

LIFTGATE OPTICAL SENSOR SUPPLY SHORT TO GROUND

BODY CONTROL MODULE - LIFTGATE WAKE UP GROUND OPEN

LIFTGATE MODULE WAKE UP SIGNAL WIRE OPEN

LIFTGATE MODULE WAKE UP SIGNAL WIRE SHORT TO VOLTAGE

PCI BUS CIRCUIT OPEN

POWER LIFTGATE MODULE - OPEN