Hey guys, my wife's 80 started idling rough this morning than the CEL came on. I only have a manual for a pre-OBD II 93 with instructions on how to get the CEL to blink codes. I thought this truck was pre-OBD II, but when I connect the terminals no code flashed. If this were an OBD II truck, were would the terminal be? I looked under the dash and didn't see one.