allensr20

ok guy just to get started am new here to this fourm, but am not a newbe
i have a 89 240sx with a sr20det i have the stock ka alternator on it and for some reason it not charging i dont think i hook it up wrong cause there is only 4 wires to hook up 1 ground 1 power and the 2 pin connector any ideas

also i have 3 wires that are cut these are by the fuse box in the engine bay have now idea where they go to

yellow/green
yellow/black
white/red

ok lat thing my gauge cluster lights and tail light will not work unless i rev the motor up any ideas on that too

sorry for so many question