Alternator help!!!!

[randy'sho]

Had my alt tested and it came back good....installed new battery....all seems fine. Now if the car idles, like warming it up for 10 mins before driving, I get the battery light on and it kills my battery...what the crap??..btw 1990

 

[Ishodu]

There is likely a bad solder joint on the windings or in the voltage reg when it heats up it looses its connection.

 

[randy'sho]

Guess I just need to have alt rebuilt