Taillight Relay Circuit

Backprobe for voltage between wireless door lock ECU terminal No. 4 (Green/Red wire) and ground. When LOCK button on transmitter is pressed, voltage should pulse once. When UNLOCK button on transmitter is pressed, voltage should pulse twice. If voltage is not as specified, replace wireless door lock ECU and retest system operation. If voltage is as specified, check circuit between wireless door lock ECU and taillight relay. See WIRING DIAGRAMS . Repair or replace circuit as necessary and retest system operation.