I recently had to change the alternator and battery in our 2003 Liberty.
I have never changed an alternator. I am handy, but never liked doing much under the hood. However, on our 2003 Jeep Liberty, I found in incredibly easy. Including taking the time to watch the 4 minute YouTube video on the tension pulley, the entire replacement of alternator and battery took 32 minutes.
Here's the scoop.
Step 1: Watch YouTube video explaining loosening the serpentine belt tension pulley. This is only 4 minutes and does a nice quick explanation. This will speed up things if (like me) you have never removed a serpentine belt.
Step 2: Disconnect the battery. (Both cables) (Pic Below)
Step 3: Disconnect the cables going to the alternator.(Pic Below)
Step 4: Using the information in the video, loosen the tension pulley. (I found it easier to use a pipe like in the video.) You will need a 15mm socket for this.
Step 5: Slightly move the serpentine belt off of the alternator pulley. Be careful that you don’t let it fall out of place or you will have to refer to the diagram and put the belt back on all of the pulleys.
Step 6: Remove the three (3) bolts holding the alternator in place. The two front bolts will use the same 15mm socket and the third bolt (on top) will use a smaller one. (I believe a 13mm)
Step 7: Remove the alternator from the vehicle. I had to wrestle it a bit to free it, but then was able to remove it without any issues. (Pic Below)
(Reversing the steps above)
Step 8: Insert the new alternator and bolt it in place. (Pic Below)
Step 9: Replace the cables going to the alternator.(Pic Below)
Step 10: (Refer to video) Align the serpentine belt back in place (if fallen out) saving the alternator pulley for last, (easiest to attach). Move the tension pulley to loosen up the belt and slip the belt onto the last remaining pulley. (Pic Below)
You’re done with the alternator! Now for the battery.
Step 11: Loosen the retaining bolt and remove the old battery. Insert the new battery and tighten down the retaining bolt. (Pic Below)
Step 12: Attach the cables to the correct posts. (I know I should not have to go here, but... RED=(+)positive… and BLACK= (-)negative.) (Pic Below)