02 ford expedition, batt good, new alt, battery lite on, alt wont charge batt, it dies

Juston G

New member
afte 20min of idol.HELP?
batt terms are tight and clean
battery tested good so did alternator, thinking a wiring prop?
battery light came on, test battery good, tested old alt bad, new one on test good. nothing on obd2, when idol can take disconnect (-) on battery and engine stops. after charge battery start right up et run 15 min turn off, click, click, click dead battery. wtf?
 
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