Re: A Tale of Two Patricians

Posted by HH56 On 2021/2/13 16:46:24

These photos might help with some of the questions. The power relay is mounted to the dash edge a few inches away from the control module as are the resistors for the blower speed change. As I recall the 4 wires from the control module area to the rear evaporator is in a loom that goes down the side of the tunnel similar to the way the loom for the rear power windows runs. I do not remember how the wire gets to the solenoid valve though. I think it is part of the main loom along with the heater blower motor wire but will not swear to that. Other than Dwight Heinmuller can't think of anyone else who might have an AC car that you could ask. If you email him he could probably tell you or even take a photo.

Note the power relay in this photo is the first or original style. It is similar to an R11 OD relay but with an extra terminal on the protected side of the fuse. Stude put out a bulletin saying stock was exhausted on that relay and a substitute with 3 terminals was to be used with a corresponding wiring change. No idea how many changed relays might be out there but the wiring change was minor and would not affect anything that would need to be changed in your loom.

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  53-4 control1.jpg (91.32 KB)


  53-4 control2.jpg (76.61 KB)


  53-4 control3.jpg (70.76 KB)