Check out this page:
https://www.2carpros.com/articles/ford-lincoln-mercury-obd1-1995-and-earlier-diagnostic-trouble-code-definition-and-retrieval
When I worked for a Chrysler dealership, I bought a Monitor 4000 scanner to work on trade-ins. That scanner looks very similar to Chrysler's older DRB2, and they were built by the same company, but unlike the DRB2, it will work on Chrysler, GM, and Ford vehicles up to the year of the cartridge, all with just that one cartridge. From working on Fords, I can share they are the most miserable models to get codes out of. I'm bringing this up because there may be more steps than those listed in the article.
One step that was always required at some point was to "goose the throttle", meaning snap it to wide-open, then immediately release it to closed throttle. Code gathering can be real tedious and some of them will be repeated. The advantage to using a scanner is it will tell you what to do, then display the code numbers and their descriptions. With a test light or sweep-type analog voltmeter, you have to be sure to count the flashes correctly, then you must look up the definitions. Scanners will also allow you to look at live data when diagnosing the causes of the fault codes.
As I recall, another one of the requirements was the engine coolant had to be up to a certain temperature. That usually happened by the time I was able to get the codes.
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Tuesday, December 5th, 2023 AT 4:19 PM
