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04 black maraud
08-31-2015, 08:38 PM
Replaced battery and alternator. About a minute into driving, the battery light comes on again. Tested all and battery so good and alternator is good. Anyone have an idea?
RubberCtyRauder
08-31-2015, 08:45 PM
Were they new battery and alternator? What volts read on the battery with car off? what does it read with car idling? Use a volt meter, not the dash gauge which is not 100% accurate.Check all wire connections are tight and free of corrosion (green)
SOSA03
08-31-2015, 09:15 PM
^^^^ what he said ^^^^

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MOTOWN
08-31-2015, 09:18 PM
What he said he said!
Turbov6Bryan
08-31-2015, 10:13 PM
Did you plug in the non charge wire connection? My f250 had a loose connection about four years ago on the top wire plug, that's what I dielectric greased and still working fine
FordNut
09-01-2015, 03:37 AM
Alternator. The Marauder uses a modulated regulator instead of an on-off regulator. Many aftermarket alternators have a problem with it.
fastblackmerc
09-01-2015, 04:23 AM
Alternator. The Marauder uses a modulated regulator instead of an on-off regulator. Many aftermarket alternators have a problem with it.

I'm guessing the alternator is the wrong one. You need a "4G" style alternator