Question about 2003 Buick LeSabre

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Need to know location of low and high pressure switch on a/c of a 2003 buick lesabre

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Find the ac compressor, follow the hose going to the rear, when you find two wires that's it
Don't touch it unless the system's been evacuated, you'll get a face full of freezing goop and probably ruin the threads, ask a parts house, sometomes the section of hose must be replaced the switch is welded on, most GM's put the switch on the expansion block,that one's usualy not removable the block must be replaced
If you paln to remove it either empty the system, or have a pro do it
THIS IS DANGEROUS BE CAREFUL

Posted on Aug 30, 2009

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May have a bad low pressure/cycling switch. Its a two wire switch and normally found on the dryer/accumulator. You can unplug that wire and jumper it. If the clutch kicks on then either the system is too low on refrigerant to activate the switch or the switch is bad.
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I have a 1992 Buick Lesabre Limited. The windshield wipers work on high and low but not intermitent also there is no power to the windshield washer pump on the resevoir.


This is the switch itself. Replace the switch and all will be well. If you need instructions, let me know. Happy new year.

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