Recently changed the alternator, battery and serpentine belt but check charging system light still comes on. Alternator is running at desired amount and charging the battery.
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My 2006 Ford Expedition completely died on me. Wouldn't jump start or anything so I had it towed. A friend changed out the alternator with a brand new one, a new belt and new battery. The Check charging system light still came on. Took it to a mechanic and they said a diod was bad in alternator. Changed it again and light still comes on. Was only coming on at idle but now comes and goes. Wires and connectors all checked. Alternator running at desired amount and charging the battery. My mechanic has no idea what else it could be.
2 Replies
DaveJMon Oct 9, 2018
Besides all that, please check the connector at the alternator which often can have corroded or melted terminals.
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Even a new lower quality alternator many times will not satisfy the voltage output monitoring system .. NAPA power supreme has eleminated the problem you have described on various makes at the shop... Nothing can take the place of *hands-on* testing by qualified personnel and installing top quality parts..