IM MISSING A WIRE HARNESS THAT GOES TO THE SI ECU I CAINT FIND IT IS IT HIDDEN OR DO I HAVE TO BUY A NEW WIRE HARNESS ANYBODY KNOW ?///

 

there's one plug inside the car and 2 plugs from the engine bay.

 

well i caint find it i just founf the green one that connects to the ones that are comming from the engine bay , im lost you think is hidden somewhere around there

 

What year is the car? For obd2a all 3 ecu plugs will come off of the motor harness, and for obd2b one ecu plug comes from the dash harness and the other 2 come from the motor harness. So it seems that your car is obd2a and your trying to use the obd2b motor harness? I guess just start off with what year the car is and what motor harness you are using. You might need to find yourself an obd2a EX motor harness.