hey guys got my wideband the other day wired it all up but 2 wires and can't find a diagram for the life of me. It has 5 wires, red - ign power, black - main ground, brown - WOT peak recal (tps input), blue - EMS/datalogger signal output +(positive), and blue/black - ems/datalogger signal output - (negative). according to the diagram of the kit and what i know from the s300 the blue wire clearly goes to d10 (eld) on the ecu for signal +, then the blue black goes to the ecu for signal -. honda ecu obd1 doesn't have o2 grounded to ecu and i can't find where to run this last wire. can anyone shed some light on this for me. thanks

 

You shouldn't need any kind of negative input. Use the 0-5 volt output from the wideband.