Mustang Voltage Regulator (1968-1970) Installation Instructions

1. Most modern alternators have voltage regulators built in. However, classic cars such as my 1968 coupe, had a Mustang Voltage Regulator that provided a constant voltage level for the electrical system. We are installing a new voltage regulator in this guide.
Mustang Voltage Regulator Install Image
2. The voltage regulator is located on the driver’s side, between the shock tower and the Mustang radiator. The top arrow is pointing to the radio noise suppression capacitor, and the bottom arrow is pointing to the original voltage regulator.
Mustang Voltage Regulator Install Image
3. First, disconnect the battery then unplug the plug going into the old voltage regulator, which leads to the Mustang alternator/generator and other components. Then, remove the two 3/8 inch hex bolts. Note: The top bolt also holds a radio noise suppression capacitor.
Mustang Voltage Regulator Install Image
4. Install the new voltage regulator by putting it in position and using the Mustang voltage regulator mounting screws to attach it to your Mustang, making sure to also reattach the radio noise suppression capacitor.
Mustang Voltage Regulator Install Image
Mustang Voltage Regulator Install Image
5. To finish the installation, you would typically just reconnect the plug to the wiring harness into the voltage regulator. However, I am building a new wiring harness for my car so I purchased a new Mustang Voltage Regulator Plug and connected the ends using my own wiring diagram. The portion of the wiring diagram that has to do with the voltage regulator is shown below, and shows the wiring locations and destinations.
Mustang Voltage Regulator Install Image
Mustang Voltage Regulator Install Image
6. Enjoy your new Mustang Voltage Regulator.
Mustang Voltage Regulator Install Image