Battery replaced and alternator checked
ok...picked up car...engine light on...won't test
cause not communicating...interior lights won't
work...keys don't unlock or lock...radio not
You probably lost all the codes in the computer. You should have used a code saver! At this point you will need to take it to a dealer.
Yep that's right. Here's a pic of a cheap one. there are fancier ones that plug right into the OBD2 port and use a jump box or other 12 volt power supply.
Check for blown fuses I know the 05 ford f150 share fuse with OBD2 and aux cigarette lighter
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