I have an 05 Durango 4.7L V8. I recently needed to replace my fuel pump & during the holidays I didn't work on it at all. So I got a new pump & put it on & now it won't crank. I pulled the pump & checked to make sure it worked. I've blown out my fuel lines, I've checked all my fuses & relays. There is no reason for it not to start. A buddy told me to check the security board since I had not been using my FOB (but I am now) & I don't know where the security board is or what exactly I'm looking for. Can someone please help.