Component Testing: TCSCS
WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
- Using the L-BU probes J-35616-65B, connect the EL-49741 9 V+ power source harness to the TCSCS as specified below for the LED being tested. Connecting the harness in the opposite pins will not illuminate the LED.
- Connect a 9 V battery to the EL-49741 harness.
- Verify that only the indicator being tested illuminates.
- If the indicator does not illuminate when tested or the incorrect indicator illuminates, replace the TCSCS.
| EL49741 Wire Color | 2WD HI | 4WD Auto | 4WD HI | 4WD LO | N |
|---|---|---|---|---|---|
| Red (pin) | 4 | 4 | 4 | 4 | 2 |
| Black (pin) | 8 | 7 | 9 | 10 | 3 |