Are you sure you checked all the fuse in the engine bay panel?
There are some large fusible links that protect the battery.

 

For clarification, a Fusible Link is a special type of wire. On the positive battery connection you will have a fat wire for the starter, and a thin wire for everything else that goes to the fuse box directly behind the battery. The thin wire is a fusible link. Trace it to the 80A fuse in the fuse box behind the battery. Disconnect the positive battery terminal from the battery and test the fusible link for continuity between the positive battery clamp and the fuse. the Ohms should read very low - 0.something.

 

We did replace the 80A fuse. The other ones are all good. There are 2 12V boxes that I didn't check. Do I need to pull those out? I really am not mechanically minded, so thanks for your info. I will test the fusible link and go from there. Thanks.

 

I accidentally jumped my truck positive/negative and blew some fuses. I replaced one in the fuse box near the battery under the hood, and another down by the foot pedals. My truck still won't start. Are there any other fuse locations that I don't know about? Any ideas? I replaced the coil and the spark plugs!! I'm stumped!!!

behind glove box pull glove box down after opening, you may have to with it a tiny bit and to the left you should see 2-3 fuses one is relay big square