b18 problems

[whiteciv88]

i have a 2000 civic ex with a jdm b18b1 in it with a type r trans in it. i have a few problems with it
1st: when the car goes past 3500 rpms the lights get brighter interior and exterior
2nd: is that my tach keeps on jumping around up and down
3rd: new battery just died
to my tach i have these colored wires mated up to each
light blue - light blue
white - black
orange - black
orange blue stripe - orange blue stripe
yellow green stripe - yellow green stripe
black yellow stripe - black yellow stripe
white blue stripe - white blue stripe
blue taped off
now i have had no problems like this before it just started today november 1 2008.
so if someone could get back to me soon i will greatly appreciate it

 

[whiteciv88]

ok so i think that i fixed it after asking around a dude said to check my grounds so i checked them and the one under the fuse box was loose so its fixed once again cant wait to see what other problems come up lol