What is a 1000 code on a 20000 cougar

This code just means that the PCM didn't complete a full diagnose cycle, and is set when the battery have been disconnected, codes have been cleared or sometimes even when the vehicle have been towed. No scanner it's necessary to clear the code, driving the vehicle for a few minutes (sometimes more) to complete the diagnose cycle will clear the code. Clearing the code will reset the light unless other codes present.

yes as rowefast said...but it could take a lot longer to reset...best is to drive it 10-15 miles let it cool down over night and redo the drive again...did you remove power to the system /replace the battery or starter??? take it back to auto zone ,,,checkers or wherever and get it re scaned again for free,,or you can by the scan tool for as little as $45.00 and do/check it your self...easy..