A/C worked fine untill two days ago,just suddenly stopped working.Checked freon,its ok.Have power going in and out of low pressure switch.Removed relay and jumppered it and compresser came on and have good pressures.Replaced relay,still no A/C.Replaced A/C switch in dash,still no A/C.Jumppered low pressure switch,still no A/C.Replaced high pressure switch,no A/C.It does not have climate control,it has manual controls.Checked fuse,ok.Fans don't come on either,only radiator fan works when temp goes up.Any help would be appreciated.
2003 Ford Taurus A/C problems Please help?
Good job of testing there. If you did everything as you say the problem is 1. the computer is not getting the a/c request signal from the a/c switch or 2 the computer is not sending the ground to the a/c relay. Also there are 2 fuses that supply power to the a/c relay. Fuse #28 supplies the power to the relay coil and the computer grounds it. Fuse #22 supplies power to the relay common contact. Both of those fuses are located in the battery junction box which is in the middle behind the radiator. Either one of these fuses would keep the compressor from engaging%26gt;
Reply:Sounds like you are not getting the ground input to the coils on the relays.Could be a computer problem,not sure on that vehicle.
Reply:sounds like you've done a good job checking it out . The relay controls the rad. fan in addition to ac comp. Problem may lie with the relay you replaced, on fords if the part no: is not exactly the same the internal schematic is different, if you purchased at a part store rather than at ford it is likely the wrong one. I've had this problem more than once working on different vehicles. Good luck
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