having a little truoble with this tach. i got the power to it its grounded and its conected to the distributor...but i cant figure out how to hook it up to my dimmer can anyone help me with this i have a 2000 civic coupe dx thx.

 

Drop the dash piece below the steering column so you can pop out the dimmer switch. Hook up to the red with black stripe wire if the tach does not adjust the brightness. If it does adjust, hook up to the solid red wire at the switch. Good luck.