Tried the following with no change: -Swapping out Ignition and EFI relays in driver side engine bay fuse block. -Disconnecting security system even further -Conzult shows "Start" signal when I turn the key to start, so ignition switch is at least working.
I used an older used battery cable on this car. The split room around the battery cable is slightly eaten up but it appears to be in otherwise good shape. Would the battery harness being old cause a no crank?