Relay switch my fan want come on, but when i plug it up the motor want say nothing so i think its the relay switch n

Only two I think ac fan come on as soon as ac is turned on and the
engine depends on switch 188 degrees it schould be marked
on the side of switch also pull tjhe wire of switch when you ground
the one wire off switch fan schould come on if fan stays on all the time relays stuck if the motor random on and off relay or motor
first replace relay cheaper then replace switch ckek motor
sirect from battery always. Hot wire jump it.hope this helped

if you have connected fans direct to battery the fans are goosed but try relays and fuses first hpe this helps

I would check my fuses and relays first with a fuse tester. it cost almost nothing to check and may very well be the problem. if all is well try replacing the switches first as it's cheaper than the blower motor. if the switch isn't the problem return it to the store and get a new blower motor. I would think though if you have done anything at all electrically such as stereo etc.etc. it may be a fuse or you forgot to plug something back in

On your vehicle, if it works on low speed, that eliminates the fuse, the blower motor relay and the blower motor resistor. All of the parts of the resistor must bee good for it to work on low. The relay supplies power to the motor and the controls provide the ground, so if the motor runs at all, it is not the relay or the fuse. The only thing left is the switch. Fords are bad about burning the wire connector that conects to the switch. You will most likely have to replace the switch and the connector. Both of these parts are widely avaiable at most aftermarket parts stores.

I think you need to check the blower motor first,
using a test light locate the blower motor,it will be behind the glove box under the dash,Turn the key on and the fan switch on,now check the wires to motor,One will be black thats ground,Check the other it could be red or blue,if your test light lights up its the motor.

If the heater only works on the high setting, your problem is the heater fan resistor, not the relay.

i think it is your thermostat control switch, it is not giving the signal to turn your fan on when it is necessary

Ok, this is either a bad resistor switch or, a blown motor. you can test the blower motor by using a volt meter or multimeter as well. In most cases, this will be a bad resistor switch.

replace blower motor switch on dash

engine coolant temperature sensor unit!? you say you had a thermostat issue some times if you over heat these the switch above might cause malfunction! I just spent 7 hours on relays!! with engine running un plug coolant sensor temp switch if your fan comes on you have no relay issues!! or ground problem keep in mind this switch tells the system the temperature then when reached sends signals to relay the fan to come on! when I unplugged mine fan ran plugged it back in off!!! replaced switch works great this is the true way to test don't get$$ it out hope this helps you out also be sure you have no air locks in your cooling system and you properly bleeded out all air sense you changed thermostat.John