Have a 1993 940T with an A/C glitch. A/C compressor will not engage. I suspect the A/C relay but cannot locate the location of the relay. Have checked behind the ashtray (where the fuses are) but it does not appear to be there. So were is the blessed thing? Also I believe the relay part number is 9442933. If this is correct or incorrect can someone let me know. This appears to be a small problem but nevertheless a big headache. Any advice would be appreciated. Thanks.