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Home >> BMW >> 2020 >> X5 M Base >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> General Electrical System -- Repair X5 M (F95) >> 61 20 Battery >> 61 20 900 Disconnecting and connecting battery ground lead (X5 M) >> Disconnecting the negative battery cable of the system battery

Disconnecting the negative battery cable of the system battery

Preliminary work 

Precondition 

Ignition is switched off.

WARNING: Deactivate the 12-V electrical system. 
Risk of short circuits! Risk of fire! 
  • Make sure that there is no battery charger  connected to the jump start terminal in the engine compartment.