Rear Differential Without Differential Lock

Check fuse No. 18 in main fuse block. Replace if necessary. Disconnect ECU connector. Turn ignition on. Using DVOM, check voltage at terminal No. 108 and vehicle ground. See Figure . If battery voltage is present, substitute ECU with known good unit and retest. If battery voltage is not present, check for open circuit between ECU and fuse block. Repair wiring harness as necessary.