battery not charging

[domf]

Help, I have a 99 Cougar, V6. The battery light came on and everything electrical stopped working, head lights got dim, all the gages stopped and the car started to mis. I pulled into a parts store and had them check the charging system, it was not putting out enough volts, needed an alternator. After about 6 hours I changed the alternator. Now the battery light doesn't come on, and everything seemed fine for a couple of minutes, and then the gages went out and the lights started to get dim again, but the battery light doesn't come on. Does anybody have an idea where I should go from here? Has anyone had a similar problem?
Thanks for any help,
Dom

[DXJ]

The same thing just happened to me. I had the rebuilt alternator tested, and it passed. Now, the battery light is on, but very dim. Is it the same with your car?

[carr17]

I would check the voltage regulator in your charging system. The old alternator could have damaged it.

[jmr898]

I have almost the same problem, but I was told that the car doesn't have an external regulator, does anyone know? if external voltage regulator where is it ?

[Burnedbyme]

LOLLLLLLLL i had this problem also i went through 3 alternators and two batteries in 3 weeks Then the Fucker at Firestone told me it was a prob he had no idea how to fix .....P.s. i got screwed outta my money lol......soooo i have the beast towed to ford and they pput 2 more alternators in it by the third time they had to tow my car from the side of the road i decided to do sum research and found out on a forum it the wire from the alternator to the battery shorting on sumthin which causes the alternator to overcharge and then bang in two days ur cars dead on the side of the road like us ))))))))))) well def hav them check it oput if its still busted