Power Interrupt Connector/Switch: Service and Repair

WM 966021 Removing main switch for power supply

Technical values





Removing main switch for power supply

Main switch for power supply





Installation position shown on the 911

1. Pull off connector -1- - B+ for the main switch (battery disconnect switch) - on the B+ terminal.





Connector for main switch

2. Unscrew the fastening nut -2- for the ground point on the body and disconnect the negative terminal -3- at the battery.





Unscrewing the ground point

3. Cover the negative terminal on the battery with a soft, dry cloth.
4. Remove battery disconnect switch together with the line for the negative terminal and screw off the fastening nut -4-. Remove line for the negative terminal.





Removing battery disconnect switch

5. Position line for the negative terminal on the battery again and screw it on securely -3-. => Tightening torque: 4.7 Nm (3.5 ftlb.)





Routing and securing line for negative terminal

Information

The electric line for the negative terminal must be screwed to the bulkhead using the painted fastening nut.

6. Position line for the negative terminal on the bulkhead and secure with the fastening nut -2-. => Tightening torque: 15 Nm (11 ftlb.)
7. Position and fit the battery cover included with the vehicle.
8. -> 2706IN Work instructions after disconnecting the battery must then be carried out.

Information

Switching on vehicle electrical system

The battery disconnect switch, which is supplied via the positive terminal, is closed manually using the external switch lever and locked electromagnetically. The luggage compartment lid must not be open when doing this.





Battery disconnect switch with external switch lever

Switching off vehicle electrical system

Information

Even when the vehicle electrical system is disconnected using the battery disconnect switch, the short-stroke lowering function of the side window remains active when you press the door handle on the driver's side.

The vehicle electrical system switches off:

If the battery voltage drops to below 12.75 V for a period of approx. 10 minutes.

Immediately, if the voltage supply of the main power supply switch (battery disconnect switch) is disconnected from the positive terminal.

Immediately, if the main power supply switch (battery disconnect switch) is mechanically released.





Switching off vehicle electrical system