Battery light flashes sometimes here and there.
new alternator (tested good) new battery (tested good)
i've check the power wire that goes to alternator and it seems goods

can it be my + battery terminal?
i cant think of anything else that will cause my battery light to light up
please help

 

where did you buy the alternator and who tested it? a lot of "new" alternators from the box stores are garbage out of the box. I'm assuming you mean by new ,rebuilt?

 

^ i bought alternator from autozone and tested over at autozone too. yeah sorry its a remanu...i told them what happen and they replaced it for me again.r....so i dont see why 2 alternator should fail?

 

because they sell garbage, it's not uncommon for people to get 3 or 4 bad out of the box there, they sold my friend a remanned alternator that looked like some redneck had wallowed out the bolt holes with a drill, then tried to argue it didn't matter as it would still work

 

Yup, re manufactured garbage. I've had them die on the dyno and cost me a tuning session before. Take it off and have them test it.

 

their test will always show it's good, but if you get it tested other places, it will show bad, an unloaded alternator test proves nothing. The **** rebuilders they use will reuse parts such as brushes etc, as long as they meet the minimum spec, it doesn't matter if it lasts a week, they put it on the shelf. If you want a good alternator, try to find a reputable electrical service place, see if they will rebuild one or what brand they use, since they would have to warranty the installation on anything they put in, they aren't going to use garbage, I went through this with the starter on the Lincoln, regular Ford starter, but every single one I got would have the contacts in the solenoid fail in a short time, I finally got one from the local electrical service shop, and it's been fine since

 

My first autozone alt was bad even tho it tested good there. Just force them to take it back and get a Denso for less price from rockauto. Denso makes our alternators.

 

your alternator brushes are probably no good, a test with no load on the alternator will show it's good, as it's not having to produce any current, (autozone with argue this lol) once you load the alternator down with a load then it will show failure, but they dont do this, their tests are a joke, I've taken alternators that I've rebuilt and I KNOW were good, I test everything from the regulator to the diodes, check brushes, check commutator windings,field windings etc, and it still showed failure on their machine, yet several years later it was running fine