Here is the fuse box from underneath...see the yellow wire tapped into the auxilary... that is the light wire so the lights go on when you turn on the parking lights. the auxilary should be the same on the del sol as in the civic. use a test light to make sure



as for the tach wire, the harness is in the wiring harness and is connected to nothing. sorry for the bad pic..but see the green wire from the tach connects to the blue wire with a harness. i am eventually going to solder it into the wire...but tapping into the harness will give you the tach signal.