Rep Power: 0

I just installed 5" autogauge tach all went well till I went to connect the wire for the illumination. My dash is all torn apart and I cant seem to find the right wire to tap into from the dash lights to get the tach to light up when you turn on the headlights ... I need to go to work in 3 hours and I am only one wire from being done can someone please help I KNOW someone out there can help me locate that *$%# wire I need to go to work

2005 Civic Coupe 5 spd 1.7L
Brandon

 
Rep Power: 0

use a voltmeter, ground it and turn on the lights to search wich wire have power when the lights are on..