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Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Engine Electrical System - Repair (N62) >> 32 Regulator >> 12 32 501 Replacing Controller Switch For Alternator (N62, N62TU)

12 32 501 Replacing Controller Switch For Alternator (N62, N62TU)

Necessary preliminary tasks: 

Carefully insert a screwdriver between cover (1) and threaded pin.

Lever out cover (1) towards top.

Fig 1: Inserting Screwdriver Between Cover And Threaded Pin
G04740403Courtesy of BMW OF NORTH AMERICA, INC.

Release contact screws (1).

Slacken nut (2).

Remove controller switch (3).

Fig 2: Identifying Contact Screws, Nut And Controller Switch
G04740404Courtesy of BMW OF NORTH AMERICA, INC.

Check contact surfaces (1) of slip rings for wear and recondition if necessary.

Fig 3: Identifying Contact Surfaces
G04740405Courtesy of BMW OF NORTH AMERICA, INC.

Press in carbon brushes (1) of controller switch (2) in direction of arrow.

Install controller switch (2).

Fig 4: Pressing Carbon Brushes Of Controller Switch
G04740406Courtesy of BMW OF NORTH AMERICA, INC.

Insert and tighten down contact screws (1).

Insert nut (2) and tighten down.

Fig 5: Identifying Contact Screws And Nut
G04740404Courtesy of BMW OF NORTH AMERICA, INC.

Assemble alternator.

Carry out alternator test with diagnostic system.