Http://www.infobarrel.com/How_to_Read_OBD1_Automobile_Diagnostic_Codes
That site tells you how to do it. Basically you use a paper clip to jump 2 ports on the obd1 connector and the check engine light will flash a certin number of times and you write down how many times it flashes. Example. flash flash pause flash flash flash is a code 23.
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