Dogbone

Hi, I'm troubleshooting an AC system on an 87 GL Turbo, I saw your reply has to a post from someone with an 88 DL in Arizona a year ago. I tried your belt protection system bypass and it worked, sort of. The compressor came on, then made a clicking noise, then a screeching noise. So I shut it down. In fact, when those two wires are jumped, the cmpressor is always on,..like a jumped the low pressure switch, not the belt protection system.. I double checked the wires selected and it all checks. ( red/gree & red/black) Any ideas?