974519 Removing and Installing Wire Harness For Starter Battery

WM 974519 Removing and installing wire harness for starter battery

Technical values





Preliminary work

1. The battery ground strap must be disconnected before starting disassembly work. => 90 Work instructions after disconnecting the battery
2. Remove front left covers (engine compartment). => 700219 Removing and installing front cover (engine compartment) - section on "Removing"

Removing wire harness for starter battery

Removing external power connection

CAUTION

Risk of injury and damage due to short circuit.

-> The battery ground lead must be disconnected before starting disassembly work. => 90 Work instructions after disconnecting the battery





Installation position of external power connection

1. Open cap -1- and unscrew fastening nut -2- on the B+ line.





Unscrewing fastening nut on B+ line

2. Remove B+ lines.
2.1. Open cap -1-.
2.2. Unscrew fastening nut -2- for B+ lines.
2.3. Remove B+ lines -3, 4 and 5-.





Removing B+ lines

3. Release connecting piece for B+ lines -1- ( -arrows A- ) and remove it -arrow B-.





Removing connecting piece for B+ lines

4. Unscrew fastening screw -1- and lift off external power connection -2- ( -arrow- ).





Loosening external power connection

5. Release locking lugs on the external power connection -1- ( -arrows A- ) and remove external power connection -1- from the B+ line -2- ( -arrow B- ).





Removing external power connection from B+ line

Installing wire harness for starter battery

Installing external power connection

1. Connect external power connection -1- to the B+ line -2- ( -arrow- ) until the locking lugs -arrows- of the external power connection -1- engage securely.





Connecting external power connection to B+ line

2. Position external power connection -2- on the holder -arrow- and secure with the fastening screw -1-. => Tightening torque: 10 Nm (7.5 ftlb.)+/-1 Nm (+/-0.5 ftlb.)





Securing external power connection

3. Insert connecting piece for B+ lines -1- and press it in -arrow- until the locking lugs -arrows- engage securely.





Inserting connecting piece for B+ lines

4. Insert B+ lines.
4.1. Insert B+ lines -3, 4 and 5-.
4.2. Tighten fastening nut -2- for B+ lines. => Tightening torque: 10 Nm (7.5 ftlb.)+/-1 Nm (+/-0.5 ftlb.)
4.3. Close cap -1- until the cap -1- is felt to engage.





Inserting B+ lines

5. Tighten fastening nut -2- for B+ line and close cap -1- until the cap -1- is felt to engage. => Tightening torque: 20 Nm (15 ftlb.)+/-1 Nm (+/-0.5 ftlb.)





Tightening fastening nut for B+ line

Subsequent work

1. Install front left covers (engine compartment). => 700219 Removing and installing front cover (engine compartment) - section on "Installing"
2. Connect battery ground strap and carry out work instructions after disconnecting the battery. => 90 Work instructions after disconnecting the battery