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1986 944 diagnostic test availablity?

Heating and Ventilation

Vehicle Information: Year: 1986; Engine (type, size, modifications): stock; Total Mileage: 185,000;

i see in another article, you said:'Porsche published a very comprehensive climate control test plan for your system that included a number of checks at the control unit plug, located on the left side of the heater/evaporator housing, so you should be able to get your hands on a copy, or take your car to a qualified dealer for diagnosis.' How do I go about get a hold of the climate control test plan? I have searched the web, no hits.

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