A/C Fuse keeps Blowing

I have a 1987 Wagoneer (small size) 4.0L, 4WD Selectrac, 237/15/75 Automatic. I had the A/C put under vacuum and refilled with 134A when I turn the A/C on it blows the fuse in the fuse box in about 2 seconds. Any idea what the problem may be. Any help would be greatly appreciated

alfman said:

Check the wiring near the compressor first for damage as that is where they were working on the conversion. It's probably a coincidence but replace the fuse then unplug the AC clutch & see if it blows the fuse. Unplug the heater motor next & so on. It could also be the blower speed resistor unit or a chaffed wire. With the engine off see if you can turn the center of the AC clutch which is the compressor drive to make sure the compressor didn't seize.

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Very good advice! An ammeter can be used to check the a/c clutch also. If it hasn't been used in a while, good chance it has rusted up a bit. Maybe check the pressures also to make sure it wasn't overcharged...