My homie and I just installed a tach into my 96 hatch, everything works fine, but when I left work last night and turned on my driving lights...the gauge wouldnt light up.....does anybody know exactly what I need to do to fix this>?

 

You need to hook up the white illumination wire to a wire with a signal that only comes on when your lights come on. I found one unused in my fuse box under the dash.