Car is going to paint on Monday for a touch up on engine bay before new motor goes in. Question is, what part of the engine wiring harness stays and which part goes. It looks like one big mess of wires. I would like to retain headlights, guages, etc.. but get rid of the Original engine sensor part of the harness, injector connectors, Map Sensor, etc.. What controls do the relays have on the driver side firewall behind the brake booster? I know the fans are controlled there but what else?I'm just sooooo frustrated with this big mess of wires. Maybe I should cut ALL of it out and start over.