Troubleshooting an engine code means pulling that code from the computer system and tracking down the source of the problem, using the clues from the code. For instance, Code 59 means "automatic transmission shift error." From that, you can tell the transmission is having trouble. Your first step might be to check the transmission fluid and have it changed if it's past its scheduled maintenance. Check the link in Resources for a full list of 1992 Ford codes and what each means.
Identify the Assembly Line Diagnostic Link (ALDL) or test port under the hood near the battery on the Ranger. It is an eight-port electrical link where the OBD scanner plugs into initiate the diagnostic sequence.
Connect the scan device to the ALDL port and turn on the scanner.
Turn the ignition "On," but don't start the engine. Enter your vehicle's information in the scanner in response to the prompts and select the option to pull the trouble codes.
Write down the codes as they appear. Refer to your owner's or service manual for the code meanings.
Address the source of the trouble code. For instance, if the code indicates a too-rich oxygen/fuel ratio, it's usually the oxygen sensor. Fix the suspected component.
Connect the scanner again, pull the codes and select the option to clear the codes.
