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Motorcraft (Ford) Alternators
D9 Series
D4 Series
E2 Series
2000 Series
4000 Series
7000 Series
Motorcraft Alternators have terminals marked “STA” (Stator) as indicated by the Arrows.
However, the D9 Series may not give the proper signal for the EOS-110. If step 3
of harness test is not satisfied, the alternator should be taken to an alternator ser-
vice shop for modification.
Most current model Ford Alternators with a built-in, solid state regulator do not
have a “STA” terminal. They may, however, have a stator connection through one
of the connectors on the unit. Refer to the Ford body builders book or contact the
dealer for assistance.
Prestolite/Leece-Neville Alternators are very common on many makes of small
diesel and large gas engines.
In the absence of a separate terminal, attach to the right hand terminal of the
three-in-a-row shown.
Foreign Vehicles: Foreign manufactured vehicles may have an alternator stator tap.
Some vehicles are equipped with D.C. generators (instead of alternators) and the EOS
cannot be connected to these generators. It may be possible to make the connection
by using the same signal location as the vehicle tachometer, as long as the signal input
conditions can be met. Refer to the EOS-110 specifications for these values.
Prestolite/Leece-Neville Alternators
Delta Connected Stator Wye Connected Stator
(Arrows Indicate Proper “R” Terminal Output)
Typical Alternator Windings