Ok Arthur,
I disconected the pressure switch, the one with the white spade conectors, and with the fans on high the compressor stays off. From what you stated earler this means that there is NOT an overpresure in the system, what's next? When I checked the wires going to the sensor you talk about in step 2 the insulation was very cracked and crumbeling. I seperated them as far down as I could and taped them seperately. Now when I move this wire I can turn the fans on or off on high by how I move the wire. I cant get to the junction where it goes into the harness because it's under the intake manifold.

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Karl B
95 E300 D
2006 Mazdaspeed 6
2001 GMC Yukon XL
1997 Contour SVT
Mazda RX-7 SCCA race car