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Cadillac Repair/86 fleetwood brougham. "NO CHARGE" light is on

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Question
I just put in a new battery, and the alternator was changed about a year ago. The car has been sitting since june. What can the cause be for this light to come on.

Answer
Either you have a short in the brown wire and or a fault in the alternator internal regulator or a faulty field circuit.

Remove the alternator and take it into most any auto supply store and they will test the alternator for free.

If the alternator tests OK then yiou have a short in the brown wire. If the alternator tests bad, Replace it.

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On hands professional expertise in all aspects of Cadillac diagnostics and repair mid 1970`s thru 2000 year vehicles. GM certified in electronic fuel injection, Automatic transmission, Heating and A/C, and onboard vehicle computer diagnostics.

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Held over 15 GM certifications prior to retirement in 1989.

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Prior to retirement held several ASE certifications, numerous Factory certifications.

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