battery light on

[04 black maraud]

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]

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]

^^^^ what he said ^^^^

Sent from my SAMSUNG-SGH-I717 using Tapatalk

 

[MOTOWN]

What he said he said!

 

[Turbov6Bryan]

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]

Alternator. The Marauder uses a modulated regulator instead of an on-off regulator. Many aftermarket alternators have a problem with it.

 

[fastblackmerc]

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