How to read trouble codes for a 1995 Mitsubishi 3000GT

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Hello, I own a 1995 Mitsubishi 3000GT base model and was wondering how to read the 1995 codes. I am aware that OBDII was standardized starting 1996, but my car has a OBDII port. My OBDII reader that I use for my E92 will not work. Do I need to use an OBDI reader with an adapter, or do I use an adapter into OBDI and then ground pins 1 and 12 with an analog volt meter to get the codes in sweeps?