For a complete wiring diagram Refer to Section 8W.When Monitored:Continuously.Set Condition:When the Totally Integrated Power Module (TIPM) detects a HIGH condition.Possible CausesCHECK (Z910) GROUND CIRCUIT(Z910) GROUND CIRCUIT OPENCHECK (L62) RIGHT REAR TURN SIGNAL CONTROL CIRCUIT(L62) RIGHT REAR TURN SIGNAL CONTROL CIRCUIT OPEN(L62) RIGHT REAR TURN SIGNAL CONTROL CIRCUIT SHORTED TO VOLTAGETOTALLY INTEGRATED POWER MODULE1. TEST FOR INTERMITTENT CONDITIONTurn the ignition on.With the scan tool, clear all DTC's.Turn the Right Turn Signal on.With the scan tool, read DTC's.Does the scan tool display active: B1648-REAR RIGHT TURN LAMP CONTROL CIRCUIT HIGH?YesGo To 2NoThe condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 2. CHECK (Z910) GROUND CIRCUITSTurn the ignition off.Disconnect the Right Rear Turn Signal Lamp assembly harness connector.With a 12–volt test light connected to 12–volts, probe each (Z910) Ground circuit.Does the test light illuminate brightly on each ground circuit?YesGo To 4NoGo To 33. (Z910) GROUND CIRCUIT OPENMeasure the resistance of the appropriate (Z910) Ground circuit(s) at the Right Rear Turn Signal Lamp assembly harness connector.Is the resistance below 10.0 ohms?YesReplace the Inoperative bulb in accordance with the Service Information.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoRepair the appropriate (Z910) Ground circuit(s) for an open.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 4. CHECK (L62) RIGHT REAR TURN SIGNAL CONTROL CIRCUITTurn the ignition on.With the Right Turn Signal still on and a 12–volt test light connected to ground, check the (L62) Right Rear Turn Signal Control circuit.Does the test light blink brightly from on to off with the turn signal indicator?YesReplace the Inoperative bulb in accordance with the Service Information.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) NoGo To 55. (L62) RIGHT REAR TURN SIGNAL CONTROL CIRCUIT OPENTurn the ignition off.Disconnect the TIPM C4 harness connector.Measure the resistance of the (L62) Right Rear Turn Signal Control circuit between the Right Rear Tail Lamp assembly harness connector and the TIPM C4 harness connector.Is the resistance below 10.0 ohms?Yes Go To 6No Repair the (L62) Right Rear Turn Lamp Control circuit for an open.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) 6. (L62) RIGHT REAR TURN SIGNAL CONTROL CIRCUIT SHORTED TO VOLTAGETurn the ignition on.Measure for voltage on the (L62) Right Rear Turn Signal Control circuit.Is there any voltage present?Yes Repair the (L62) Right Rear Turn Signal Control circuit for a short to voltage.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE) No Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information.Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)