Do you have fire at the yellow wire/terminal on the "ign" terminal on the starter relay? If not, work upstream to the bulkhead & further up to the "st" terminal on the ign switch including its female connector as needed till you find the open. If the yellow wire is hot then permanently ground the male "grn" terminal on the starter relay (which will negate the OE safety feature of not allowing it to crank (move forward) in drive or backwards in reverse (it can now) if that is a concern, or work downstream from there to the trans/shifter to find the actual open & definitely do Stumpys' test first. Holler back