I have the same issue. The battery light is very dim, new alternator and checked the charging system. It all started when I accidentilly drove through a huge puddle ( looked like I parted the red sea
) Immediately after the felt like it wanted to turn off, battery light came on and just as soon as I said to myself "OH OH" it went away and i continued my drive...however my battery light has remained dimly lit ever since
Cant figure it out...bad ground due to moisture after driving through the puddle ? I have been recently having a hard start issue when hot also.