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  1. check engine light stays on unable to diagnose or reset

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    Hello everybody, I am looking for assistance. I have a 1985 el camino 305cid trying to pull code from OBD1 prom using a paper clip in the last 2 upper slots and nothing. the only slot that has voltage is the 1st upper slot. I've disconnected the battery awhile and as soon as I turn on the...