I have some interesting findings. The relay is good. I swapped it with the relay next to it, (same model relay), and no change. I can also hear a faint click in both relays when the car ignition starts.
Then I pulled the relay and probed the points. The one point that seems totally off is terminal 85 ground. There's no continuity when I check it with the multimeter's other probe touching battery ground.
As for the other relay points - I think these are correct, assuming the relay switch is not closing:
Terminal 86 reads 14.5v with AC or blower on; no voltage with AC/blower off.
Terminal 87 (output) reads continuity with the compressor chassis, but 0.1v when AC/blower is on or off, so I assume switch is not closing.
Terminal 30 (battery) reads 14.5v with AC on or blower on; no voltage with AC/blower off.
So. Is the problem no ground reaching the relay? On the diagram it looks like it comes from the compressor control module? That part of the diagram is cut off. Please advise as to the next step!
Monday, June 28th, 2021 AT 1:07 PM