my fans arent coming on. i tested them with 12 v and they both work. replaced the senser on the therm. housing still not working. even when the ac comes on no fans

 

can anyone help me out

 

On almost all cars the fans should go on if the a/c is turned on, triggered by the powertrain computer or by an a/c pressure switch. The fans may not go on instantly, but certainly within a couple of minutes. If they don't, proceed to a circuit diagnosis. The simplest first circuit check you can make is the current feed, starting at the fuse, which on late models is in an underhood fuse box. Just pull it out and look. Replace it if it's blown. On older models it's often a fusible link-a short section of wire typically four gauge numbers higher than the wire of which it's part. You may see it's singed. Even if it isn't, pull on the ends of the wrap, and if it stretches, the wire underneath is broken.

If the fuse is ok...The most practical approach is to go next to the end of the circuit: the fans themselves. Most cars have two fans. Unplug one fan's wiring connector and (referring to the wiring diagram color codes) hot-wire the fan motor's half of the connector. Run one jumper wire from the current feed terminal of the connector half to the battery's positive terminal. Attach a second jumper wire to the other terminal of the connector and run it to an electrical ground. The fan should run. If it doesn't, the fan motor apparently is defective.

Hope this Helps.

 

thanks.i will check these things but the fans do work when you give them 12 volts

 

If all else fails and your tired of messing with it. Hard wire the fans to a toggle switch and be done with it for under 10 dollars.

 

thanks but i can jerry rig something without help. i am more interested in figuring out the problem