Heat will only defrost, no matter where I put the dial.

Minor fender bender ? Where , front , rear etc.... Could have damaged wiring harness , sometimes GM mounts the PCM - engine computer behind fenders , body parts etc...

9 times out of ten you half to replac them even if was a minor fender bender. The seat belt reel has a component the breaks and locks under a certain amount of load.

check for a broken /loose vacuum line on the engine . Trace it back to the fire wall and it will most likely be the culprit/

For car not changing gears it can be shifter assembly issue, or it can also be transmission issue. Get the shifter assembly inspected with ignition OFF.

For more troubleshooting, I suggest you to get the Following help link checked, its complete step by step procedure to inspect gear shift issues: -----

GEAR SHIFT ISSUES

http://alltypesofpartsreplacing.blogspot.com/2012/11/gear-shift-issues.html

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These will help.

Thanks.

Mine is on the floor between the passenger seat and door sill.

inertia switch

Turn the key to the on position and plug in a scan tool and scan the computer. use the trouble code and go to mitchell on demand and search the trouble code and the program will tell you what is malfunctioning and how to fix it.

Yes there is, but not sure if it has a reset button or different type.What did dealer say & where did they say it was?

chech cable on back of cluster dial some time pops of causing issue.

ford has a fuel cut off switch in case of a fender bender sometimes located in trunk or by pass floor board need to reset switch