I think the wire was too close to the back of the pulley on the compressor causing the short. I took a screwdriver and pushed it back away from the pulley and then zip tied it back away from the pulley. I cranked it, flipped the a/c switch but the clutch didn't engage.

I put a jumper wire up on the dryer to force the clutch to engage. I did so after I checked the pressure. It had a pressure of about 45 (ambient temp outside here at home is about 50 degrees). The clutch engaged with the jumper wire. It ran fine and did not blow the fuse out.

I took the jumper wire off and re-hooked the plug back on the pressure switch on the dryer. I could not get the compressor to work. I pulled the plug off and jumper wired it: compressor works.

Well, do I now look to the a/c relay or the pressure switch on the dryer or something else?
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93' 240 Classic Wagon 220K & 92' 740 Wagon Regina/Rex 90K

It is not a bad ground. It could be the wire has worn through in one spot where it contacts ground, up by the compressor. That has happened to me on much older models. Or it could be the clutch needs to be replaced.

Simple diagnosis between those two: disconnect the clutch near the compressor. Check the wire and its routing for any spot it may have rubbed through. This is a good time of year to make that test unless you are having trouble defogging the windshield. Even so, with fuse 12 intact, you can roll down the windows.
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Art Benstein near Baltimore

Merry Christmas!