Hitachi FDV 20VB Technical Data And Service Manual page 16

(1) For Models with noise suppressor and choke coils
Stop Piece
Connection of the carbon brush terminal and the stop piece
For cord
(brown or black)
Connection of internal wires to the switch
Main switch section
Forward/reverse
changeover section
(White)
(Blue)
(Brown)
(Black)
Insert it with the convex side
faced upward.
Carbon brush terminal
(Black) (Brown)
(Blue)
(White)
For noise
suppressor
(black)
(Gray)
(Red)
For cord
(blue or white)
Noise suppressor
(Red)
(Gray)
Wiring diagram
(Black)
Housing (A) side
(Gray)
Connection of internal wires to the stator
(viewed from the commutator side)
(White)
Noise
suppressor
(Brown or
black)
Cord
(Blue or
white)
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(Red)
Housing (B) side
(White)
(Red)
(Blue)
(Black)
Switch
Cord
Wiring diagram
(Brown)
(Gray)