VW Taigo Starting Failure After Ignition Switch Repair

Had a similar situation with my 2020 VW T-Cross. The car would not start and showed identical symptoms to what you describe. After checking the starter solenoid, discovered the voltage drop was caused by loose connections following the previous ignition switch work. The main issue was poor contact between the solenoid and power supply cables. The mechanic had not properly secured the connections during reassembly. A thorough inspection revealed corrosion at the terminal points, which further compromised the electrical flow. Recommend checking: 1. Battery terminal connections 2. Starter solenoid wiring harness 3. Ignition switch connector pins 4. Ground strap condition This turned out to be a serious electrical system problem that could have damaged multiple components if left unaddressed. The fix involved cleaning all contact points, replacing corroded terminals, and properly securing all connections with the correct torque specifications. Would suggest having a voltage drop test performed across the starting circuit to pinpoint the exact location of the resistance issue before replacing any parts.

Thanks for sharing your experience. Sounds very similar to my situation. After reading this, I checked my starter solenoid and found loose connections too. The car won't start issue was indeed linked to the relay switch that got damaged during the previous repair. How much did the fix end up costing you? Also wondering if youve had any recurring issues with the fuse box or electrical system since the repair was done?

Got the issue resolved last week, it was exactly as suspected with the Terminal 15 ignition positive being interrupted. The mechanic found and fixed the faulty cable connection, which was causing the power supply problems. Total repair cost came to 95€, which was reasonable considering the diagnostic work involved. Since fixing the loose connections and replacing the damaged components in the fuse box, the electrical system has been working perfectly. No more voltage drop issues or starting problems. The key was making sure all battery terminal connections were properly secured this time. Sounds like catching the loose solenoid connection early helped prevent more extensive circuit break damage in your case. Good troubleshooting on checking those connections after my post. Just make sure whoever does the repair thoroughly tests the entire starting circuit afterward to prevent any recurring issues.

After getting your feedback, I took the car to a different repair shop. They diagnosed the exact issue you mentioned, a damaged relay switch and loose connections from the previous work. The mechanic was upfront about the previous shop's mistakes and showed me where the wiring harness had been improperly secured. The repair was straightforward. They cleaned the connections, replaced the damaged relay, and properly secured all components in the fuse box. Total cost was 120€, which included a full electrical system diagnostic. Much better than the 400€ quote from the original shop. Car starts perfectly now and the voltage drop issue is completely resolved. Really glad I checked those connections based on your advice before letting another shop start replacing parts unnecessarily. The new mechanic also gave me a 12-month warranty on the work, which provides good peace of mind.