I am pretty sure that the small black connector is for the fan relay mod that makes them run for 10 minutes but I am not positive on this. What is the larger black connector for?

I have my harness on the left for comparison.

Any help will be appreciated

 

Fan control box from the cooling system recall, which should be on the stock ECU bracket. I'm not sure you need it if you have a programmable ECU.

 

Hmm... This is a definite concern for me

I found your old post @ https://www.rx7club.com/showthread.p...an+control+box , you seemed pretty certain on your answer so it sounds like I have a recall harness, can I leave this hookup disconnected then?

 

If you have a PFC, you can use the Datalogit to program when your fan come on.

 

So the recall fan mod is essentially useless w/ a PFC then?

 

Yes