OK so I have a 91 jdm crx sir, the engine was swap to an lsvetc keeping the original head. I purchased the car this way. I have noticed that the coolant fan will not turn on. when stuck in traffic I do have to shut the car off or it will over heat.
The fan was tested and works. I know there is no conector on the thermostat switch. the engine harness was not cutu and I do have an extra that doesn't have that conector as well.
Its a B18B1 base with the jdm sir head, any ideas I am trying to avoid running a switch I really would like it to look oem and run as it should any help would be appriciated.

PS looking at the inside fuse box (japanisse writting) how ever when I compare it to a cdn crx says slot 15 is the collant fan how ever on the jdm japanesse one the slot 15 is blank.

 

check the relay thats mounted on the radiator support. i forget which relay it is (theres like 3 of them)

 

ok sorry for being naive any insgith how to test them I believe there are 2 of them.

 

um, well you can jump the thermostat switch. turn on ignition and see if it turns the fan on. if it doesnt, and you know the fan works, then the relay is most likely the problem. you can test them out using a digital meter. might be a bit complicated if you dont know how to use it.

if i remember, there is a diagram on the relay itself. it will be a 4 plug relay. dont follow this example. (like i said example, might be different), 1=ground 2 = power and 3-4 = switch. by applying power to points 1 and 2 you should hear a click. indicating the relay is switching circuit.

 

The termostat switch is the relay?
I will test those relays out thanks

 

the thermostat has a switch (plug) . unplug it and jump the plug together. this will test your fan circuit. that is all. to test, jump the plug at the thermostat, turn the ignition to II (not start) and the fan should be on.

If it doesnt turn on then you can have a few things that are bad. fan, relay, a break in the wires, etc etc.

since you KNOW the fan works. you can test the relay next (which is located on the radiator support). if that relay works, then you might have a break in the wiring some where. Use a digital meter to find continuity. This is what i would start off with.

 

i should have read your post thoroughly . Reason why you dont have that connector on the thermostat is because the engine is a OBD1. your original harness (obd0) thermostat switch plug is located at the rear of the engine block. Check the rear of the engine and see if you notice two unused wires. the older plugs are just two single connectors that is covered up by a boot.

you would need to source a OBD1 thermostat switch plug and connect them to your existing older style plug. cut off the old one and solder on the newer style plug. you will of course need to extend them because of the different locations.

hope you can understand that.

 

I do have 2 loose wires covered with 2 individual plastic pins which are near my alternator are these the wires you are mentioning? does it matter which I connect to witch?
Thanks for your insight you have been a great help so far.

 

figured it out now works perfectly thanks ef yu.