ok, i have a 05 4x4 screw 4.6. motor is stock besides exhaust and filter.



the other day i went to drive the truck, started up fine, and headin down the street. i made it about 2 blocks til my lights started dimming out, gauges stopped working, and truck died. my battery gauge said my batttery was dead. i had someone jump me and just almost didnt make it back home to drop the truck off. i checked all my fuses and they were good. i then took my battery out to get it checked. the part store said my battery was shot(it wasnt replaced for awhile), so i bought a new one. put it and and was good to go. drive around a little. everything seemed fine. came home, hooked it up to the volts tester to make sure it was not my alternator. everything was holding charge ok.



or so i thought



today i went to drive and start up was a little slow, as soon as i turned my headlights on i could watch the battery gauge drop til my gauges stopped working.went to start it again and just clicked like the battery was dead. i waited about an hour, came back, started right up, then slowly dies. im not sure if i have a short somewhere or if its my alt. any ideas?

 

Sure sounds like an altenator to me.

 

im going to pull mine out tomorrow and get it tested.

any other thoughts

 

You can get a volt meter and see what voltage it is putting out without removing it. Should be 14.3 or so volts.