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S3 Spiders did not have a pressure switch.

The 1990 Series 3.5 and 91-94 series 4 spiders have A/c trinary pressure switch on receiver dryer according to shop manuals but 86 manual does not show one for series 3.

I thought my friends 88 Quad has it but I maybe mistaken. Car not near me now to check on it.
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