1986 4WD GL Wagon emision woes

[smb1989gl]

(OOPS sorry 1989 not 1986) I have an 1989 4WD GL Wagon with the EA82 spi engine that i have been banging out the body work on for my kid. Now that I have it all prettied up I have a check engine light and am just short of passing our Atlanta metro area emissions requirments. I have found some of the info here about reading the codes. I am not sure though if the gl wagon blinks the check engine light or if it only blinks the oxygen monitor light and if this is the case where can it be found in the gl wagon. Also not clear on the propper procedure to initiate the code reading process. If anyone can help me out I would be very grateful