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Re: AC BLOWING FUSES
Yup - you're probably right regarding a dead short.
If you can remove the fuse, turn unit to on position, then use a meter set to ohms between the output side and ground, Then you can see what resistance there is. A dead short will be a very low value. A higher value will indicate a stuck or siezed motor somewhere. - Then to track down which one it is!
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fuses blow because the current flow is in excess of the fuse rating and that is normally from a dead short in the circuit after the fuse
I suspect that the ac compressor rely is faulty and I would start looking in that area
Let's break this down.
1 Does the fuse blow when the heater is on, or just the AC?
Yes- Fan motor problem likely need new blower motor.
2 Disconnect the AC compressor clutch wire. Remove the blown AC fuse, connect a multimeter across the sockets for the fuse, measure DC voltage across the two sockets with the AC switch, and Ignition switch ON. Is Battery voltage present?
Yes- The wiring harness has a short between the output of the AC switch and ground, likely a pinched harness.
No- The AC compressor clutch is shorted. Replace either the whole compressor or the clutch.
IT may be a faulty ac clutch coil (shorted out or wire touching the earth ). Have it tested and if that is the case then clutch pack coils can be bought and fitted without removing the compressor or opening the gas side .
Remember that when you THINK the AC's off,it's really not.Almost all cars have the AC compressor actuate every time you set the dial to `defrost' or `mix' positions. On a TAURUS there are only two positions(maybe three)which DON'T kick the AC on.On some cars,that's the 11 o'clock and 2 o'clock positions on the selector.
SO...........the odds are that the compressor magnetic clutch or wiring to it has shorted.Because you really have power going there even when you think you don't. (:^) don-ohio
WELL AC COMPRESSOR HAS TO BE WORKING IF YOU GETTING COLD AIR.YOU HAVE FUSE/RELAY BOX AT THE LEFT END OF THE INSTRUMENT PANEL ALSO YOU HAVE FUSE PANEL UNDER HOOD IN ENGINE COMPARTMENT ON TOP OF BATTERY.CHECK THE 30 AMP FUSES ONE CONTROL THE COOLANT FAN CONTROL MODULE IN WHICH OPERATES THE AC COMPRESSOR CLUTCH CIRCUIT AND AC PRESSURE SWITCH.
there is a pressure switch on the ac drier that is the big silver can looking thing by the dash under the hood... if this goes bad the ac compressor will not kick on and the fans will not run when the ac is turned on... if the fans are not running at the same time of the ac compressor it will not blow cool..
The ac compressor is probably siezed. When you're turning on the ac it cant turn the compressor so its blowing the fuse. It could also be that the clutch windings are shorted.
That would be my first guess.
You can locate the wires on the compressor clutch that engage the clutch, remove the belt, and leave the engine turned off. Apply power from the battery to the clutch wires and see if you can move it at all with your hands. Use small gauge wire and maybe put in a inline fuse. If the clutch is burned up it will blow the fuse. I think the inline fuses are pretty cheap at a auto parts store. If its not burned up, and you cant move the pulley at all by hand, more likely than not you need to replace the compressor.