What connections are there on the alternator?

Home Wired and Inspired Charging & Alternators What connections are there on the alternator?

Is there a standard?

Unfortunately, there is no standard for alternator designations. Therefore, we have compiled the most common ones below.

B+ goes to positive on the batteries (via a main fuse).

B- goes to the negative on the batteries, the starter motor, and any earth points.

D+ receives a magnetising current when the alternator starts.

Some alternators also have W, which is the tachometer socket, and DF, which is in direct contact with the magnetizing winding of the rotor.

Possible letter: B+/B1+/B2+/B/A
Possible character: +
Possible number: 30
Possible abbreviation: BAT

Possible letter: B-/D-/-VE/E/E-
Possible character: –
Possible number: 31
Possible abbreviation: GRD/Earth

Possible letter: D+/L/I
Possible character: +
Possible number: 61/61E/15
Possible abbreviation: IND/Ind

Possible letter: F
Possible character: –
Possible number: 67
Possible abbreviation: DF/DFM/FLD/EXC

Possible letter: W/P/R/S
Possible character: –
Possible number: –
Possible abbreviation: STA