Aloha,

1979 450SLC (R134A) - A/C is on and the compressor doesn't spin. There's blowing going on, but not cold. Further, I don't see any movement in the inspection glass of the receiver/drier. I'm thinking that the dash switch may be faulty (actually I'm praying that the switch is faulty) and would like to test it before moving on to suspecting the compressor itself. (needless to say, I'm praying that that's not the problem)

Can anyone help me with some instructions on how I can test the switch, or any other suggestions that might help me get my cold air back?

Thanks in advance,

__________________
Ray

1980 300SD (Anthrcite Gray) 253,108 miles
1982 300SD (Silver Blue) 242,398 miles
1982 300SD (Black) 263,185 miles