Hi i have a 91 civic hatchback. Got it from a friend for dirt cheap, with a b16a swap. Dogs got into it and chewed up the wire harnesses, but i was able to get an si rear harness and a crx si cabin harness. I connected everything i could together, and its a crank no start, cause the fuel pump isnt getting any power.
I have this one connector that, when i give power to the yellow/black wire with a power probe, turns on the fuel pump, i just cant figure out where the connector connects to.

 

by the looks of it, appears like the one above the fuse box. keep in mind 88-89 and 90-91 have different rear harnesses