Below is copied from my build thread. Make sure the covering on the wire is not hiding any exposed wiring causing a short. At the top of the connector, you can see where I had to wrap my wire with electrical tape.
I blew the Engine fuse again.
FIXED!!! Mine was the Reverse Lights on the Tranny. It has a protective sleeve and depending on how the sleeve slides, it can cover the wires where they rub against the tranny leaving them exposed. Below is other fixes for this problem.
Haynes Manual page 12-11 shows what all is on this circuit