Question about Ford Mustang
You start your car and set the Air Conditioning to maximum and yet it does not blow out cold air. You pop the hood and the the Air Conditioning Compressor Clutch will not engage, so lets figure out why not. With the ignition key on, unplug the low pressure switch (clutch cycling switch) and place a jumper wire across the connector. The switch is generally located on the side of the accumulator. If the compressor clutch does not click in then you need to check for Battery Voltage at the connector first.
If No battery voltage is present, then check the fuse. If the fuse is good you will need to repair the wiring between the fuse and the low pressure switch connector.
If there is battery voltage at the low pressure switch connector and the clutch does not click in when the jumper wire is attached, then you will need to move to the A/C Clutch Relay.
Make sure you have good battery positive and ground at the relay. If you do not receive a 2nd battery voltage when the jumper wire is attached, then the wire may need to be replaced...
If you do have 2 positives, a good ground but do not see power leaving to the compressor clutch you will need to replace the Air Condition Clutch Relay
If you do have Power leaving the A/C Clutch Relay and heading to the compressor but not power at the clutch, then replace the wire between the two. If you have power at the compressor AND IT DOES NOT Click in (engage) then you need to replace the compressor.
Hope this this can help to solve it.
Posted on May 22, 2010
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Posted on Jan 02, 2017
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