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Home >> BMW >> 2021 >> M440i >> Repair and Diagnosis >> Accessories & Equipment >> Steering Column Switches >> General Electrical System -- Repair (G22, G23 & G26) >> 61 20 Battery Ground >> 61 20 900 Disconnecting and connecting battery ground lead (4' Series coupe models) >> Connecting the negative battery cable of the auxiliary battery in the engine compartment

Connecting the negative battery cable of the auxiliary battery in the engine compartment

Check 

Result 

» the auxiliary battery is not installed in the engine compartment.

Measure

Result 

» 48V battery is removed.

Measure

Result 

» 12V dual storage battery is installed.

Measure