How to Replace the Alternator on a '97 Mustang

Available with the 4.6-liter, two-valve engine, the 1997 Ford Mustang remained relatively unchanged from the prior model year. The alternator -- rated at 130 amps -- has an electronic integral voltage regulator. Alternator repair kits and replacement brushes are available for your unit.

Things You'll Need

  • Memory-saver device
  • Wrench set
  • Ratchet
  • Socket set
  • Foot-pound torque wrench
  • Inch-pound torque wrench

Removal

  • Open the hood and allow the engine to cool. Install a memory-saver device according to the manufacturer's instructions.

  • Loosen the negative battery cable pinch bolt, using a wrench, ratchet and socket. Rotate the terminal on the post slightly to encourage it to release, then disconnect the terminal from the battery.

  • Unplug the alternator wiring harness connector from the back of the alternator. Remove the alternator output nut, using a ratchet and socket, then remove the terminal from the post.

  • Install a ratchet handle on the drive belt tensioner and rotate the tensioner to release the drive belt. Slide the belt off the tensioner pulley and slowly release the tensioner.

  • Remove the alternator mounting bracket retaining bolts and remove the bracket. Remove the alternator mounting bolts, using a ratchet and socket, then remove the alternator.

Installation

  • Hold the alternator in place and install the mounting bolts. Torque the upper bolts to 15 to 22 foot-pounds. Install the generator mounting bracket and tighten the bolts to 71 to 106 inch-pounds.

  • Rotate the drive belt tensioner, using a ratchet handle, and install the drive belt. Ensure that the belt is fully engaged with the alternator pulley.

  • Plug in the alternator wiring harness. Install the output wire terminal on its post. Install and torque the output nut to 62 to 79 inch-pounds, using an inch-pound torque wrench and socket.

  • Install the negative battery cable terminal on the battery post. Tighten the terminal pinch bolt to 68 to 92 inch-pounds. Remove the memory-saver device.