as the topic states im having some problems with my fan coming ON. On the wiring harness at the radiator there is two wires one of them is the ground (which i checked and its good) but where does the other wire go to ? I checked the fan and it works. I just need to know where the other side of the wire is pluged into....is there a relay? I want to trace back the wire and make sure its plugged into correct place.Post your coments thanks

 

The black wire at the radiator fan connector goes to ground, THe Blue/ Black stripe wire goes to the cooling fan relay(4 PIN)located in the RF of engine compartment. This relay is powered at 2 pins by Fuse #15 inthe underdash fuse box. 1 pin is grounded by the coolant temp switch when it closes(around 90C) and the other pin goes to the pwer side of the fan motor. Knowing your car is an ef Your old rad fan switch was bolted intothe back of the block. Your new rad fan switch is at the Tstat housing(I think) Did you reroute and change those connectors?

 

I dont think my car has a fan relay..the way im thinking of doing is run a wire from A12 which is colant temperature switch run it to the thermo switch and from there to the fan itself. The fan has a power to it throught #15 so the other wire that i want to run from A12 is going to the grounding wire for the fan....is this right???

 

You need a relay to control the rad fan, Honda/Acura use both pos.(+) and neg.(-) to control rad fan, depending on make/model, by your discription I am assuming your rad fan has 12V+ directly from fuse 15, "The fan has a power to it through #15" if so it is the ground that is used as control, ground is supplied by the rad fan relay and the rad fan relay is controled by the ECTS, [engine coolant temperature switch].
Not sure what you mean by, "the thermo switch" unless you mean the ECTSU, [engine coolant temperature sending unit] which has nothing to do with the rad fan, it sends a signal to the ECTG, [engine coolant temperature gauge] in the cluster and should in no way be connected with the ECTS.

If you are missing the rad fan relay, get one, or wire one in, it's pretty simple. 94

 

A12-FANC engine coolant temp switch Blu/red, n/a

D13-ECT (engine coolant temp) sensor input Yel/Blu, ~5V KOEO (varies with temperature)


whats the difference between these two (obd1 pinouts)

 

The engine coolant temp. switch, [the switch itself] is a simple on/off switch, closing a ground circuit when engine coolant temp. reaches about 190 degrees F.

The engine coolant temp. sensor, [the switch itself] is a variable resistor, [thermistor] where resistance changes with engine coolant temperature.

The first is used to control a relay, [rad fan relay] the second is used to control the engine temperature gauge in the cluster. 94

 

i got it all figured out thanks alot for all the help...i had to wire in the relay

 

thats where i got the info

http://www.the12volt.com/installbay/...ric+fan+switch