I've got this 98 ECU and the 98 DOHC wiring harness. Underneath the fuse box is a clip that holds two pretty major connectors (One is 10 pin, the other is 10 pin (on the 95 harness) and 11 pins (on the 98 harness)). I traced the wires down and I'm left with one wire - A green wire with yellow stripe. Here is what I've found: In the 98 harness, it seems it handles the radiator fan signal and fuse in the ENGINE harness, while in the 95 SOHC harness, it handles the radiator fan in the CHASSIS harness. using the 95 radiator - I think I'm ok just tossing the green wire out of the equation (It goes to pin #23 on the new harness, and the older harness doesn't have a pin #23) Do you have access to either an ECU pin-out, 98 Harness wire-out, or the accurate wiring diagrams for the engine harness ? Thanks ! -> Steve The ECU is broken out into two entire harnesses. The first harness is the engine connector, the second one is for the chassis controlled stuff. Things like Cruise control, A/C switches and ABS is contained in the second one. The first one is for the engine - And all will work on the 98 engine, but the harness needs to talk to the fuse block without issues. This green wire looks like it belonged to something in the 98 fuse block. I need either detailed source for wiring diagram / schematics or the ECU pin-outs for the first gen Neon. Any help ?