Re: Battery Light stays on in dash.
what he said!
The light on the dash illuminates when the alternator is not charging / or the alternator internal voltage regulator is not plugged in (its gets its ground through this light, so light on = no voltage regulator)
Use a volt meter you should have at least 12.5 volts at batteries with truck off, you should have 11-12V at batteries during glow plug run time and starting and once running at idle or above you should have 14.2-14.5V at the batteries. Anything under 14.2 and your alternator is not charging enough.
It is likely the alternator voltage regulator (on side of alternator) is not plugged in or the alternator has failed.
Weird you are seeing 1/2 way on the volt meter with this light on
Let us know what you find.
1997 CCFB 7.3, ZF5, 4x4, 4.10, baby swamps, TS6, RSK
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2001 Excursion 7.3, auto, 4x4, 3.73, freight train family hauler, collecting parts for 4" suspension lift