Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Fuse 79 is good.Voltage on both sides of the fuse indicates the ac relay isn't getting the signal to "close". The resistance on the coil shows that it isn't "open" and will engage the clutch when power is applied.
You can pull the relay, jump 3 to 5 with a jumper wire that will handle the 10a and test the compressor clutch operation with the engine running.
Also check fuse F79 10a in the battery junction box and charging voltage at the battery posts with the engine running at idle.