how to fix the battery draining overnight in Porsche Cayenne E3 (2018-Present)?

Solution

1. Preparation

• Tools Required: Multimeter, ammeter, socket set, wrenches, wire brush, dielectric grease.
• Safety Warnings: Disconnect the battery before working on electrical systems to avoid shorts.

2. Battery Replacement (if necessary)

1. Remove Battery Terminal Connections:
   • Use a socket or wrench to loosen the negative terminal first, followed by the positive terminal.
2. Remove Battery:
   • Unfasten any clamps or brackets securing the battery in place and carefully lift it out of the tray.
3. Install New Battery:
   • Place the new battery in the tray and secure it with clamps or brackets.
4. Reconnect Battery Terminals:
   • Connect the positive terminal first, followed by the negative terminal, ensuring connections are tight and free of corrosion.

3. Address Parasitic Draw

1. Identify Faulty Components:
   • Based on the previous diagnostic steps, identify components that may be causing the draw, such as a faulty relay or module.
2. Replace or Repair Affected Components:
   • Obtain necessary replacement parts and install them according to manufacturer specifications, ensuring proper connections.
3. Recheck Current Draw:
   • After replacement, recheck the parasitic draw to ensure it is within acceptable limits.

4. Electrical System Inspection

1. Inspect Wiring Harnesses:
   • Look for any damaged or frayed wires that may be shorting out.
2. Clean and Protect Connections:
   • Use a wire brush to clean battery terminals and apply dielectric grease to prevent future corrosion.