Ford Mustang/Capri 1979-1988 Repair Guide

Voltage Regulator


Completely solid-state regulators are used. These voltage regulators are calibrated and preset by the manufacturer, so that no readjustment is required or possible. Earlier model vehicles utilized a separate or external voltage regulator, which was often mounted on the right-hand fender apron. Later model vehicles utilized an integral alternator/regulator, in which the voltage regulator was located within the alternator itself.


External Voltage Regulator

See Figure 1

  1. Remove the battery ground cable. On models with the regulator mounted behind the battery, it is necessary to remove the battery hold-down, and to move the battery.
  3. Disconnect the regulator from the wiring harness.
  5. Remove the regulator mounting screws, radio suppression condenser (if so equipped) and regulator.

To install:
  1. Mount the regulator to the regulator mounting plate. The radio suppression condenser mounts under one mounting screw, the ground lead under the other mounting screw. Tighten the mounting screws.
  3. Connect the wiring harness to the regulator.
  5. If the battery was moved to gain access to the regulator, reposition the battery and install the hold-down. Connect the battery ground cable, and test the system for proper voltage regulation.

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Fig. Fig. 1: Some vehicles contain an external voltage regulator, often mounted on the right-hand fender apron