After I put a b18c into my EF, i could turn the ignition to the on position and everything worked as normal. At random a few days later while finishing up the car, it would do nothing when I turned the key to the on position except the battery light would light up. No other cluster lights or beeps.

I had a toggle button wired up for my starter anyways, but I can't check engine codes now. Any clue where to start looking to fix this problem?