Mystery (a/c) Electrical connector

[72ray]

Hi legends,
I’m sure somebody here can IDENTIFY and EXPLAIN this electrical connection that joins my
a/c compressor +ve power supply (dark green) what the wiring diagram I have says is the low pressure switch. Apologies for my electrical ignorance in advance.

 

[Cadder61]

Took me a few minutes to recognize it (haven't seen one since my parts-guy days 20 years ago ) but that is a thermal limiter fuse. Paraphrasing a bit, but when there is improper refrigerant flow, causing too high a temp, the normally open pressure switch will close and send current to this fuse which then melts and opens the clutch circuit. GM has not used them since late 70's.

 

[72ray]

Cool, That makes some sense as it was hanging off an a/c pipe. So if I put a meter on it there should be continuity between all three posts?

 

[Cadder61]

Not a hundred per cent sure about all three but if it is not melted internally, there should be continuity across at least two of them.