How to Replace Your Alternator

If your car or truck won’t hold a charge, you probably need a new alternator. Luckily, replacing your alternator is one of the simplest tasks in automotive maintenance. Below, we will show you the few simple steps you need to take to get the job done right, the first time.

Step 1

Start the alternator swap-out by disconnecting both battery cables from the battery. Then remove the wires and cables from the back of the alternator. Then remove the two alternator retaining bolts. The bolts are really long and you’ll be cranking for a long time. If there was ever a time to invest in an air-powered ratchet, this is it. The bolts are usually different lengths, so note where each bolt came from. With the bolts removed, lift out the old alternator and drop in the new one. Then reverse the procedure to reinstall. Below are some pictures with a few instructions.

Disconnect the cables from the alternator

Depress the latch clip on the electrical connector going to the voltage regulator and wiggle it out. Then loosen the locknut to the “BAT” cable and remove the ring terminal.


Rotate the belt tension-er (if equipped) or loosen the ‘tensioning’ bolt near the alternator. Then slide the belt off the alternator pulley.


Until next time, friends!

Sources: WikiHow, The Family Handyman & Google Source

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