Battery And Hicas Light Keeps Poping Up+ Other Problems 32 Gtr

[KyuubiGTR]

Hey people just in need of some help, well first my battery light popped up and then my car started dying so I charged the battery and used a multimeter to check if the alternator was putting charge back into it and it was, but it was still dying so I bourght a new bigger battery and drove it for two days and it died again could the alternator be at fault and only charge sometimes.....next problem for some reason every time I give it a boot full my hicas light comes on and it also come on a little before my car disides to die anyone know why or how to solve the problem any info would be greatly appreciated=)

[BOOZTJUNKEY]

Check the main fuses in the engine bay I had a cracked fuse which caused similar issues if not I would be leaning towards the charge wire of the alternator or possibly the alternator itself ...

[t_revz]

brushes in the alternator could be worn down and only touching some of the time. hicas light is prob only coming on when the voltage gets too low.

[KyuubiGTR]

All fixed=)..one of the clip on the back of the alternator were broken\cracked so when I gave it a bit it would slip...thanks for for the help anyways