Vw Tiguan 2010 turn light left always on

Repair Help Audi & Volkswagen
1

I need help with my VW Tiguan 2010, the left turn signal light stays on in the middle of the control or below the control, I changed the turn signal switch and the error persists, that another part may be damaged. Thanks you

2

If your 2010 VW Tiguan’s left turn signal light remains constantly illuminated even after replacing the turn signal switch, there are several potential culprits and troubleshooting steps you can take:

  1. Relay/Fuse:
    • A stuck or malfunctioning relay can cause the turn signal to stay on. Check the turn signal relay; it may need replacement.
    • Also, inspect the related fuses to ensure they’re not blown or seated incorrectly.
  2. Grounding Issue:
    • Poor grounding can lead to erratic behavior of electrical components. Check for a clean and secure ground connection for the turn signal circuit.
  3. Wiring Issues:
    • Examine the wiring leading to the turn signal light. Damaged or frayed wiring can lead to shorts or continuous power delivery.
    • Inspect the wiring harness and connectors for any signs of corrosion or damage.
  4. Control Module:
    • Modern vehicles utilize Body Control Modules (BCM) or similar electronic modules to manage various lighting functions. If this module experiences a fault or software glitch, it might cause the turn signal to remain on. A diagnostic scan might reveal a fault code related to the BCM, and a software update or reset might be required.
  5. Bulb Socket:
    • Sometimes, the issue can be as simple as a corroded or damaged bulb socket. Inspect the turn signal bulb socket for any corrosion or damage.
  6. Other Electronics:
    • Occasionally, aftermarket electronics or accessories can interfere with the car’s electrical system. If you’ve recently installed any aftermarket items, consider their potential impact.

To accurately diagnose the issue, a systematic approach is recommended:

  • Start with a visual inspection of the accessible parts.
  • Use a multimeter to check for proper voltage and grounding.
  • Consider conducting a diagnostic scan to check for any related fault codes.

If after trying the above, the problem still persists, it might be time to consult with a specialized VW mechanic or dealership to ensure a thorough inspection and diagnosis.
Hope this helps, and best of luck with your VW Tiguan!