C1104: Traction Control Lamp Circuit Short to Battery
Diagnostic trouble code C1104 indicates a short to battery voltage in the traction control active lamp circuit. This manufacturer-specific code is triggered when the control module detects abnormally high voltage in the TCS/ESP warning lamp circuit, suggesting a direct short to the battery positive terminal. The traction control active lamp is a visual indicator that informs the driver when the system is actively intervening to maintain vehicle traction.
1. Commonly Affected Makes
2. Most Common Causes
- Internal short circuit in the traction control indicator lamp
- Damaged wiring insulation in the lamp circuit causing a short to battery voltage
- Bent or corroded pins in the instrument panel connector or harness causing a short
- Internal failure in the traction control (TCS) or ABS module lamp driver
- Short circuit on the instrument cluster printed circuit board
3. Symptoms You Will Notice
- Traction control active lamp stays on continuously or illuminates when not expected
- Traction control system may be disabled or inoperative
- ABS or traction control warning lights may also be illuminated
4. Step-by-Step Diagnosis
Scan for additional codes and note freeze frame data
Visually inspect the traction control lamp circuit wiring and connectors for damage, corrosion, or shorts
Test the lamp circuit for voltage with key on; if voltage is present when lamp should be off, suspect a short to battery
Check the instrument cluster and TCS/ABS module for internal shorts by performing continuity and resistance tests
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, but the traction control system may not function properly, increasing the risk of loss of traction in slippery conditions. Have the issue diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs typically range from $100 to $400, depending on whether the issue is a simple wiring repair or requires replacement of the instrument cluster or control module.