The AC cooling on my 1988 750 has been less than great, after several hours of driving the cooling starts to fade. I decided to check the auxilliary fan out so I disconnected electrical lead on the dual range temperature switch, right side of radiator,turned on the ignition, and the aux fan stated up (low speed I believe). I then removed both of the fan relays and (you guessed it) the fan still runs. No electrical temperature switch connected, no relays in place and still she runs. I think some Jaeger Meister is in oreder while I ponder this one. Any suggestions from the crowd?