Head light question

[mat82284]

ok i was testing my alternator and when im run my car with 65watt bulbs my volts drop from 14.3 to 13.6 and varies up and down when i turn the heater on it goes to 12.10 anyone know if this means my alternator is going bad or something else my alternator powers at 14v on idle but doesnt seem to charge fast someone said i may need a rebuld anyone else have some appinions

 

[custom89stang]

ok i was testing my alternator and when im run my car with 65watt bulbs my volts drop from 14.3 to 13.6 and varies up and down when i turn the heater on it goes to 12.10 anyone know if this means my alternator is going bad or something else my alternator powers at 14v on idle but doesnt seem to charge fast someone said i may need a rebuld anyone else have some appinions

The stock alternator is ****. When i have my headlights on and i hit the break lights at a stop light and i have the heater going and my stereo bumping it drops to 12 amps, the batterys are supposed to be 12-13 amps normal. When your engine revs higher, say, when im cruising the amp puts out more power so the battery meter goes back up. get a bigger alternator if u wanna get rid of this. If not, just dont run the heater at full blast, i keep it on the second notch or sometimes off when its at night and i have my head lights going. but when i get cruising again i can have it on as much as i want. cuz the alternator is putting out its maximum charge

 

[whitemustang89]

yea i have recently had this problem my tach would fluxuate and my light would go dim unless i was at a good rpm.

 

[mat82284]

well the thing is i have a 130amp alternator and i know that this should not be happening at all on this