Alternator Help!!

My battery light and the e-brake light comes on and other times its not. i know that those lights mean the alternator is not charging but i cant figure out why it would be working and then stop every once in a while. sometimes ill be driving with the lights on and then they just go off and i get full power back to the vehicle. the truck is a 2004 nissan xterra. any help will be great

check you connections on your batt and your alt. seems like somethings loose more than bad to me.

its weird. it doesnt come on when im driving only when i start the truck. and then other times when i start it the lights arent on

You also might want to check any sensors that could be realated to your charding system. Sometimes moisture and dirt and stuff can mess with them. Don't know if this will help but worth a shot

Dude i just had the same thing happen to me, battery light flashing and what not

It was a bad battery in the back

Even though it rested higher than the others it was still bad, when i took it out, never happened again.

was your light constantly on or was it off sometimes when you start the vehicle cause thats what mine does. the lights will be on and i drive somewhere to do whatever and then when i start it up again its not on

if you think there is an alternator issue, see if you have a local alternator shop you can pull it off and take it to them. my first thought would be with what charles said. but to make sure there is no issue with the alternator, take it off and let them take it down and check it out. could be an intermittent problem there. a good alternator shop could fix it. also what battery do you have

modxterra wrote:

was your light constantly on or was it off sometimes when you start the vehicle cause thats what mine does. the lights will be on and i drive somewhere to do whatever and then when i start it up again its not on

It just flickered on and off a couple times when driving down the road and everything went dim

I think my alt is crappin out too, but with that batt out i dont get NEAR the voltage drop with it in

Weirddd stuff

right now only the yellow top optima is under the hood. everything else was taken out months ago

Get batt load tested at autozone and have them test alt

It was the alternator. man that was a good 400 bucks down the drain. luckily i still had my factory one laying around

Reminds me of my 200 amp alternator on my nissan sentra. Doesn't happen to be ExcessiveAmperage?

no it was Mean Green. it was the only high output that any brand made for my truck ugh

Hmm I heard meangreen were good alts. Well I'd check all the connections and also see if your belt is tight enough. I would talk to meangreen about it; the problem could be as little as a smaller pulley maybe its just not charging much at those certain rpms.

the connections were good and the belt was tight. i think it was the brushes. i missed the warranty by 2 months so i got to suck it up