Test Description
WARNING: This page is about a different car, the 2005 GMC Yukon XL and 2005 GMC Yukon. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic table.
- 2: This step determines if the module can command the indicators ON.
- 3: This step determines if the indicator or wiring is at fault.
- 4: This step tests the lamp feed circuit for an open or high resistance.
- 5: This step tests the LED dimming circuit for an open or short to ground.
Transfer Case Shift Control Switch Indicator Inoperative - One or More
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Transfer Case Control Schematics Connector End View Reference: Transfer Case Control Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 |
IMPORTANT:
Do not damage a connector or circuit when back probing.
|
Go to Step 4 | Go to Step 5 |
| 4 | Test the effected indicator control circuit for an open or high resistance. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Was the condition found and corrected? |
Go to Step 8 | Go to Step 7 |
| 5 | Test the LED dimming circuit for an open or short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Was the condition found and corrected? |
Go to Step 8 | Go to Step 6 |
| 6 | Replace the mode switch. Refer to Transfer Case Shift Control Switch Replacement . Is the repair complete? |
Go to Step 8 | - |
| 7 | Replace the transfer case shift control module. Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Is the repair complete? |
Go to Step 8 | - |
| 8 |
|
Go to Step 2 | System OK |