The alternator in a Honda Accord sends electrical current to various accessories in the vehicle while the engine is running. Most modern alternators have a built-in voltage regulator to ensure the voltage level remains constant. If your battery keeps running down or your headlights become dimmer while driving, you may need to replace the alternator.
Determine which alternator your Honda Accord needs. Be sure the new alternator is compatible with your Accord's engine. Models made from 1976 to 1985 have a 1.6 L or 1.8 L engine, and 1986 to 1989 models have a 2.0 L engine. Models built from 1990 to 1993 are equipped with a 2.2 L engine. Models made from 1994 to 1997 have a 2.2 L or a 2.7 L engine.
Look at more recent generations of the Honda Accord. Models manufactured from 1998 to 2002 have 2.3 L or 3.0 L engines, and models made from 2003 to 2007 have a 2.4 L or 3.0 L engine. The eighth generation of the Honda Accord debuted in 2008 and is available with 2.0 L, 2.2 L, 2.4 L and 2.2 L turbo diesel engines.
Disconnect the negative and then positive battery cables with a socket wrench.
Remove the four-prong connector from the rear of the alternator. Remove the terminal nut from the rear of the alternator with a socket wrench, and disconnect the wire.
Loosen the bottom through-bolt and then the adjusting bolt with a socket wrench so that you can disconnect the alternator belt. You can now completely remove the adjusting bolt and lock nut along with the through-bolt. This allows you to remove the alternator.
Install the new alternator assembly. Replace the alternator belt and adjust it to the proper tension before you tighten the adjusting lock nut to 16 foot-lb. with a torque wrench. Torque the through-bolt to 33 foot-lb. with a torque wrench.
Use a socket wrench to secure the terminal wire to the alternator with the terminal nut. Connect the four-prong connector and both battery cables.