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Old 03-16-2014, 06:10 PM
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Not Charging Please Help!!

I have a 97 f350 and it recently died because it was just running off the battery and I suspected it was the alt and replaced it but it is still not charging unless I touch a wire from my positive batt post to the green wire connecting to my alt. After I touch the wire it will charge to normal (14.2) but it wont stay at that voltage and drops to about 13... I have replaced the alt about 3 times so far and charged the batt before installing each time. I also ran a continuity test all the way to the pcu and took it to the dealership to ge the pcu flashed because I thought it was the computer, but its not...

Thanks in advance and I hope someone can help
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Old 03-17-2014, 06:09 PM
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You should get 12V (battery voltage) at the Light Green/Red trace wire with the key in the START or RUN positions. If you don't the alternator will not charge since alternators need the field to be energized to charge. Does your charge indicator lamp illuminate prior to starting the engine (key in RUN or START)? Cheers!
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Old 03-17-2014, 07:11 PM
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the indicator lamp is not on either times
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Old 03-19-2014, 06:12 PM
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Without starting the engine, put the key in the RUN position and check for 12V at the Light green wire. If there is nothing, you will need to investigate why (burned out charge indicator bulb, open circuit, etc. Cheers!
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