Charging System Message

[60DegreeVVT]

Well i just joined and did a bit of searching and didnt get the answers i was looking for. here is the problem.

About 3 months ago i got a "Check Charging System" and the local AutoZone guys said that it was a bad alternator. SO... i replaced it. and like a pro (sarcasm) i hooked it up, not reading any instructions (not my first rodeo) and i didnt follow the "Start Up Instructions"

now it has been 3 months and the error message and battery light comes on, YET the battery is between 13.7 and 14.1 volts at idle. even under a load, like AC, Brights, Blinkers, Loud Stereo and rolling windows up or down and it does not change.

i read on a Mustang forum that it could be that the parts store gave me the wrong amperage alternator (130 rather than 110)

Any help or suggestions?

Thank You

 

[ELVATO]

Take the part number and search it up, and see what specs you get.

 

[Rico70]

Hey 60Degree, I have the same damn problem with my 2004 Expedition. I replaced my alternator with one from AutoZone also! The light has been on for months. I checked it with a voltmeter and its working fine but the stupid light and "Check Charging System" keep coming on. I see you are from Aurora also, if you are from Illinois did you happen to get it at the Galena Ave. location? I found this on another website http://www.justanswer.com/questions/1yq4b-2004-ford-expedition-5-4l-check-charging-system-came-on-alternator I guess the voltage regulator in these rebuilds may be bad, I am going to take this alternator off and exchange it for another one, I will let you know if that solves the problem.

 

[nvycrmn]

i had this type of problem with my old silverado. just cuz its "new" doesnt mean it works. you could have gotten a bad alternator. i would just take it back and get a new one.

 

[Rico70]

Well, I took it out and exchanged it for another one. Works fine now, no more "Check Charging System" and battery light. Good thing I did it too because I noticed a tear in my serpentine belt and replaced that too.