Bad alternator...or not

[hillbillycny]

hi everyone...i am driving a 2007 chevy aveo 5 with a manual trans. the battery light started flashing and the after letting it sit overnight, it would not start the next day...we replaced the battery and a chevy tech tested the car and told me it was not charging and i would need a new alternator..i replaced the alternator myself and the battery light is still coming on...intermintantly, and i cannot find a bad wire anywhere..please help...we are 380 dollars deep and i cant find the problem

[Ratchet104]

Any DTCs? And does it stay running after you put the alternator in?

[avguy]

Do you have a digital multi-meter? If so, you can do a simple load test on the new alt. If not, a dome light test can be used instead, to get a fairly good ballpark estimate. Battery needs to be fully charged in order for the load test to be meaningful. The new alt might be bad out of the box, and it wouldn't be the first time that ever happened.
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