I'm ordering a new alternator today. I figure it's over 20 years old probably time for a new one anyways. And I don't think it's the ecu. The guy I bought it from put in a summit performance computer and I swapped it out with the original one and it did the same thing. I'll check the grounds for sure thow

 

Mopardaokta,
Read the FAQ page. There is a link to a list of the codes and what they indicate.

 

I have a book with the codes, the only one it threw was 41 but after driving it went away