Alternator not charging battery

Removed Alternator on 2016 4Runner, had it tested, ok, reinstalled it still not charging. I have checked all fuses, under hood as well as under leftside of dash. Double checked all 7.5 fuses. Any suggestions?

 

Factory battery?

If it is its 8 years old.

 

Well if it's not the alternator its the battery. And if your getting voltage its not the fuse.

When did u change the battery last? What kind of battery?

 

New Battery installed first. Removed alternator,had it tested for output; 14.2 volts.

 

Brand name of battery is DieHard Gold. 750cca.

 

If your alternator is putting out 14.2V its probably not that.

By not charging what do you mean? Battery dies quickly? You probably have excessive current draw when its not running.

 

Hmm, well it's not an AGM. Alternator tests fine and new battery.

If you had it tested off the car you could still very well have a charging system problem. damaged battery cable, either positive or ground side either one, a bad loose or corroded battery cable connection, a bad or loose battery ground. Could also be a terrible parasitic draw.

 

Charged up battery to full charge. Current state of charge of battery 12.8 volts . Started vehicle checked charging voltage at battery posts: 12.2. Headlamps on,blower motor cranked up to full load, battery voltage drops to 11.2.

 

Also, before starting motor and after fully charged battery was reinstalled, checked for battery light in the instrument cluster . There is no illumination. I do know that if you do not have the battery light does not light up the alternator voltage regulator does not get energized to allow alternator out put.

 

Is there a hidden fuse somewhere I could check? I did add 12 volts to the alternator wiring harness 4 pin plug. The battery light in the instrument cluster illuminated.

 

I checked all underwood fuses and under dash at leftside. No blown fuses. Battery cables clean and tite. No corrosion at alternator post. Main alternator fuse good.

 

Check grounds

 

Checked all body grounds,engine to frame grounds, main negative cable as well.

 

Tested ok but still not charging. then it's the alternator. How many miles on your 2016? If over 140K, that's probably it.

 

The vehicle has 78k on it. My customer bought it brand new. The alternator is oem. My experience is that most alternators usually last about 100 to 150k. But Asian vehicles have a pretty good track record of manufacturing reliable electrical components. If this tested alternator doesn't charge I will replace it with a Nippendenso alternator. I've never had a issue with them.

 

Was gonna ask mileage. Alternator brushes go between 150-200k miles typically.