Power Protection Relay: Service and Repair

WM 974619 Removing and installing cutoff relay

Technical values





Preliminary work

1. Disconnect battery ground strap. -> 2X00IN Work instructions after disconnecting the battery - section on "Disconnecting" 2X00IN Work instructions after disconnecting the battery
2. Loosen the rear fuse box. -> 978409 Loosening and securing fuse box - section on "Loosening" 978409 Loosening and securing fuse box

Removing cutoff relay

NOTICE

Voltage peaks

- Risk of damage to loads or to the control unit

-> Disconnect the battery before removing the component or control unit.

WARNING

Incorrect handling of safety bolts

- Danger of injury
- Loss of torque

-> Always use new fastening screws and nuts following removal.
-> Observe specified tightening torques.
-> Carry out a visual inspection of all re-used parts.





Installation position of cutoff relay in the power distributor

1. Switch off ignition and remove remote control.
2. Unscrew the fastening screw on the power distributor (HSB) -arrow A-.
3. Pull the power distributor (HSB) up out of the guide -arrow B- and carefully set it aside.





Unscrewing fastening screw

4. Release the cover on the power distributor (HSB) and open it.





Opening cover

5. Release electric plug connections for the cutoff relays and disconnect them.





Disconnecting electric plug connections

6. Unclip the (HSB) control unit at the clips -1- and set it aside together with the connections.





Unclipping (HSB) control unit

7. Unscrew fastening nuts on the cutoff relays.





Unscrewing fastening nuts

8. Pull the eyelets -2- of the electric lines up and out.





Removing eyelets

9. First remove cutoff relay -3- , then cutoff relay -4-.





Removing cutoff relays

Installing cutoff relay

Information

- Use new nuts!

1. First position cutoff relay -4- , then cutoff relay -3-.





Positioning cutoff relays

2. Push the eyelets -2- of the electric lines onto the studs.





Pushing on eyelets

3. Tighten the fastening nuts -3- on the cutoff relays.=> Tightening torque: 8 Nm (6 ftlb.)





Tightening fastening nuts

4. Clip the (HSB) control unit in at the clips -1-.





Clipping in (HSB) control unit

5. Plug in electric plug connections for the cutoff relays until the connectors engage securely.





Connecting electric plug connections

6. Close the cover on the power distributor (HSB) until the locking lugs engage securely.





Closing cover

7. Slide the power distributor (HSB) into the guide -arrow C- and screw in the fastening screw -arrow D-.





Tightening fastening screw

Subsequent work

1. Secure the rear fuse box. -> 978409 Loosening and securing fuse box - section on "Securing" 978409 Loosening and securing fuse box
2. Connect battery ground strap. -> 2X00IN Work instructions after disconnecting the battery - section on "Connecting" 2X00IN Work instructions after disconnecting the battery