I have a 97 Honda Civic and I just installed a yonaka racing radiator, but the cooling fan wires didn’t come with a plug. Can someone tell me what plug I need to use and how to wire it?

 

Did the radiator come with a fan? You should be able to just use your existing fan (that's bolted to your stock radiator). If you still have it, it should fit the new radiator and plug right back in like normal.

If not, you're looking for C211 (Connector 211), which is a 2-pin, grey plug. Should be around there somewhere near the radiator and have a Black/Red wire and solid Black wire. The Black/Red wire goes to the Blue wire in your hand and the solid Black wire goes to the Black wire in your hand.

 

This wire your saying is around radiator, I don’t think I have it. All the wire by my radiator are the ones for the reverse lights. So do you know where I could buy one? Also I know this will sound dumb but where does the radiator fan plug into. Is it the engine wire harness? Or does it have a separate wire harness like the headlights or reverse lights?

 

The fan plugs into the engine compartment harness, not the engine harness. Find your headlight and horn wires and the connector (C211) should be between those two. The fan should have two short wires coming off of it (1 Blue, 1 Black) which connect to the engine compartment harness (Black/Red => Blue / Black => Black)

See the diagram here:

 

Ahhhh ok sweet those pictures really helped, I found the plug I think? It was tucked way under my radiator support. I also found my old radiator but the fan was broken so I just stole the connector off of it. Are these both the right plugs?

 

That's it. Just cut off those cheap bullet connectors and re-solder the factory new connector back on to the fan wiring. Blue => Blue, Black => Black. Plug it in and test that the fan's working.

 

Do not get caught up in the wire colors... focus on the function. Temporarily connect the blue to blue and black to black... then turn the key on, jump the fan switch connector from the thermostat housing and when the fan comes on, feel which way the air is flowing. If it is blowing toward the transmission, then the wiring order is correct. If it seems to be blowing toward the front of the car, reverse the order of the wires and recheck. Once you are sure of the air flow, then permanently attach the wires.