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I'm not sure on a Sonoma but generally it's on or near the accumulator/drier near the fire wall where to lines go to the evaporator.
 

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Discussion Starter #3
The high side switch is there but there's no sign of the low side switch, could it be in the front on the condenser?
 

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The high side switch is somewhere between the compressor discharge side and the orifice tube, which includes the condenser. The low side is between the orifice tube (or expansion valve) and the suction side of the compressor, which includes the evaporator. So, if your orifice tube is on the exit side of the condenser then the low side switch could be up front downstream of that tube.
 

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Discussion Starter #6
Well I cannot find the low pressure switch anywhere. Could I just be low on freon
 
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