The voltage regulator controls the output of the alternator. Without this voltage limiting function of the regulator, the excessive output of the alternator could burn out components of the electrical system. In addition, the regulator compensates for seasonal changes in temperature as it affects voltage output.
All Subaru models have a solid state regulator built into the alternator. The regulator is non-adjustable and is serviced, when necessary, by replacement.
REMOVAL & INSTALLATION
See Figures 1, 2, 3, 4 and 5
- Disconnect the negative battery cable.
- Remove the alternator from the vehicle.
- Remove the through-bolts from the alternator.
- Detach the front cover with the rotor from the rear cover with the stator by lightly tapping on the front cover with a plastic hammer.
- Separate the voltage regulator assembly from the rear cover by removing the nuts on the rear cover and the retaining bolt securing the regulator to the case.
- Install the regulator assembly to the inside of the alternator case and secure with the retainer bolt and nut.
- Assemble the front and rear case halves. Tighten the through-bolts to 2-4 ft. lbs. (3-5 Nm).