1990 jeep grand wagoneer will not turns over but will not start?

I just went through this with my '89. The part that was bad was the Ignition Control Module. The Haynes manual said it was located inside engine compartment on the firewall on passenger side. I found it on my Jeep in the engine compartment, driver's side wheel well near the bottom. Three screws hold it in place and they are accessed from the outside of the wheel well.