Pickup had a voltage drain, alternator bearing problem. I put a new (not rebuilt) alternator on. I found the cause of the voltage drain, trailer brake switch with a short. Now after charging the battery and attempting to start the vehicle, it won't stay running and a message comes on the display, "battery not charging". I had the alternator put on the bench, tests OK. Can my problem lie in the ECU, because of all the dead bat,charge bat, dead battery, charge battery?
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