Here is a schematic of your system. The compressor clutch is controlled by a smart relay. One of the inputs to the relay is probably has a problem or the relay itself is bad. Check the imputs - things like engine speed input, overheat input etc.

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I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
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91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
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