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<p>[QUOTE=&quot;JB7, post: 12356290, member: 339737&quot;]Still did not say if you checked the pressure in the system? Usually 2 switches, a low pressure and a high pressure. Start at the compressor and follow the lines. Most times switches are outside of the firewall. If not, you will have to go behind the dash where the heater core and evaporator are. If the switch has 2 wires 1 is signal and 1 is ground. Low pressure switch should have continuity between the 2 terminals. Meaning that the pressure in the system is adequate and allows current to flow through the switch. 3 wire would be trial and error w/o a diagram. One 5v reference, 1 signal and 1 ground. Then there is likely an a/c control module.[/QUOTE]</p><p><br /></p>

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