Finally got my car, but none of the dealers called me despite leaving so many numbers. BYD dealers kept calling, so I ended up buying a BYD.

Finally got my car, but none of the dealers called me despite leaving so many numbers. BYD dealers kept calling, so I ended up buying a BYD.

Help Needed: 2011 Nissan Sunny Low-End to High-End Instrument Panel Upgrade Issue At first: As shown in the picture, I bought a 2012 luxury version of the Sunny instrument panel. I removed the wires from the low-end panel and connected them according to the high-end socket order. Because I enlarged the wire holes when removing them, it led to poor contact. Initially, everything was normal except the fuel gauge didn't display. Could it be due to poor contact? Then, I reconnected the original low-end instrument panel, which led to the time, trip mileage, and fuel consumption resetting every time I started the car. Finally, I got another high-end socket. This time, I arranged the wire order for the high-end socket first, then connected wires from the low-end socket to the high-end socket (this method avoids enlarging the socket and causing poor contact). Now I'm stuck with the following issues: 1. The engine light is on. 2. The turn signal, headlight, and fog light indicators on the instrument panel don't light up, and there's no ticking sound when using the turn signal. 3. Each time I start the car, the time, average fuel consumption, and trip mileage reset. 4. After turning off the car, the tachometer stays at 1, then drops to 0 and returns to 1 when the car is started again, which seems normal. Everything else seems normal. Could fellow forum members help analyze what the problem might be? I'm almost crying.