B166B-LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition on.
Set Condition:
The Totally Integrated Power Module (TIPM) Detects a LOW condition.

Possible Causes

(L673) LEFT TRAILER TOW LAMP CONTROL CIRCUIT SHORT TO GROUND

TOTALLY INTEGRATED POWER MODULE

Diagnostic Test

1. INTERMITTENT CONDITION

Turn the ignition on.
With the scan tool, clear all DTC's.
Turn on the Left Turn Signal.
With the scan tool, read DTC's.

Does the scan tool display active: B166B-LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW?

Yes

Go To 2

No

The 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. (L673) LEFT TRAILER TOW LAMP CONTROL CIRCUIT SHORT TO GROUND

Turn the ignition off.
Disconnect the TIPM C6 harness connector.
Measure the resistance between ground and the (L673) Left Trailer Tow Lamp Control circuit.

Is the resistance above 10k ohms?

Yes

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)

No

Repair the (L673) Left Trailer Tow Lamp Control circuit for a short to ground.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE)