I have a 91 Si, that I put a JDM D15B VTEC in. I am trying to find places for all my wiring (OBD0 engine harness) on my motor, and it's not proving easy. Does anyone have any idea what these plugs are suppose to go to? Blue circle is a 2 wire plug, and red circle is a single wire plug. Both wires are pretty short, and won't extend much further from where they are now. I don't see a place for them on the back of the block for the new motor (JDM D15B VTEC). I am missing my IACV wiring, could the 2 wire plug be that? Thanks in advance!

 

I did this swap about 6 years ago, so I am lost trying to remember exactly what I did, but judging from these pictures I have 2 coolant fan switches? This motor is suppose to only have one...

 

the one by the oil filter is a obd0 switch and the thormostat one is a obd1 switch
the wires that are used are the two by the oil filter

so if your going to be obd1 then you just cut and extend those wires over and connect them with the proper plug for the thormostat
switch

get it ?

 

Yep, I got it. I thought that was what it was, thanks Marcos.