12 32 501 Replacing controller switch for alternator (N62, N62TU)

Necessary preliminary tasks: 

• Disconnect battery negative lead .
• Remove alternator  

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

Lever out cover (1) towards top.

Fig 1: Identifying Cover

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Release contact screws (1).

Slacken nut (2).

Remove controller switch (3).

Fig 2: Identifying Controller Switch, Nut And Screws

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

Fig 3: Identifying Contact Surfaces Of Slip Rings

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

Install controller switch (2).

Fig 4: Identifying Controller Switch And Carbon Brushes

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Insert and tighten down contact screws (1).

Insert nut (2) and tighten down.

Fig 5: Identifying Screws And Nut

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Assemble alternator.

Carry out alternator test with diagnostic system.