My friends 1999 Honda Civic Si won't start when the key is in the running post, the dash lights don't turn on as well but everything else works like the highbeams, interior lights, ect.

We believe it's a faulty ignition switch because the ignition switch doesn't receive any voltage; verified with a DMM.

The battery is good and the car will run if we give the ignition switch power directly from the battery and jump the starter as well.

 

If there is no power to the white wires that feed power INTO the ignition switch, a new switch will not help.

Check the main fuses and connections in the underhood fuse box.

 

My friend replaced the main fuse and I'll check the connections