shavedsvt
Veteran CEG'er
i had this exact problem. for a week straight i traced it to the one way diode in the engine fuse block. its the little black looking fuse. i dismantled my fuse block from another car and put it in mine and when i did that i must have dropped one of the pins in the block. the whole inside is male and female connectors. well the one for the one-way diode dropped down and didnt make a connection. if there is no power going past this the car wont start it wont even crank, sounds like the same thing to me. either the diode is blown or if the new wiring harness is from a junk yard maybe someone messed with the block before you got it.