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How did you hook up the inline fuse to compressor and ground to compress ? Ground what ? Right at the clutch coil ? You have to be hooking it up wrong . The compressor can't cause the clutch coil to short or blow the fuse , even if the compressor were seized up . An before that would have the serpentine belt would burn up , squealing noise. applying B+ voltage in the relay socket ,pin 30 to pin 87 will engage the compressor clutch . If the fuse blows the wiring from the relay to the compressor clutch is shorted to ground . Look for rubbed through wiring harness .
An AC system blowing hot air is usually due to a low freon charge or a non operational AC compressor. If the fuse blows, disconnect the compressor electrical plug and turn on the AC. If the fuse doesn't blow, suspect a compressor problem. If the fuse continues to blow with the compressor disconnected, there is a direct short between the ON/OFF switch and the compressor which can take hours to diagnose
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.
No- 2
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.
Defective compressor clutch, or ground fault in the ac switch circuit. Disconnect lead to compressor from ac switch. Run a fused line from the battery to the compressor, if it works without blowing the fuse, check for fault in the AC switch circuit.
first thing check AC compressor fuse.the AC compressor clutch should engage when you turn on airconditioner if AC compressor dont come on and fuse okay compressor clutch is open or low on refrigerant you need check your AC refrigerant low pressure side and high pressure side need a manifold gauge set. best let garage check out AC system could need system recharged or could have leak in the system.
I purchase atruck and they put a wire from the compressor ac to fuse box. I want to eliminate that because ac compressor is always on. I check the ac heater selector switch and is ok. What if they take the fuse of ac out and bypass with a wire. Wich number in the chart fuse box is the compressor switch
CHECK AC COMPRESSOR CLUTCH COIL WIRE CONNECTOR HOOK UP.IF AC COMPRESSOR CLUTCH COIL WIRE CONNECTOR HOOK UP WRONG OR WIRE HAS A SHORT IT WILL BLOW THE ECM FUSE AND AC COMPRESSOR FUSE.CHECK FUSES AND AC COMPRESSOR WIRES.
CHECK AC COMPRESSOR FUSE OR RELAY.IF BOTH FUSE/RELAY GOOD.PROBABLY YOUR REFRIGERANT TOO LOW.FAULTY AC REFRIGERANT PRESSURE SWITCH OR OPEN AC COMPRESSOR CLUTCH COIL OR PROBLEMS WITH THE PCM.
When your R-134a runs too low it will NOT engage the compressor. You need to refill your a/c system before the clutch will engage, I also suggest finding the leak.
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