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Old 04-05-2013, 11:58 AM
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no charge alternator

Hey guys. love the forum and really appreciate all the good wisdom here.
I am working on 06 superduty. (it has single alternator) alternator quit charging and ran batteries down. charged batteries, replaced alternator and still have problem. read all i could find on forum and it seems my alternator is not getting the signal to charge via the small 2 wire connector. the "A" circuit (orange w/ light blue) has 12v all the time so all good there. the "I" circuit (light green w/ red) has 0v all the time. when I put 12v jumper to "I" terminal on alternator, it starts charging fine. looks like "I" circuit comes from the instrument cluster. any thoughts as to where i can find this?

thanks in advance for your help
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Old 04-05-2013, 04:14 PM
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well, found the problem. there was a small connector behind the passenger side battery that has the light green with a red stripe wires going into it. looks like the other side of the connector was chewed up. was able to strip these back and connect the circuit. problem solved.
hope this helps anyone else with the same problem.
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