Oh I think I see the problem. I'm not sure about the fourth gens, but in a fifth gen (and 94-01 Integras), the wiring harness comes in two pieces. One is in the car and goes to the engine bay at the shock towers. The second one is on the engine and connects to all the components and then to the shock towers. So it's actually much, much easier to swap out the engine part of the harness with the engine outside of the car. The car part of the harness that goes to the ecu and parts of the dash don't need to be touched.