Can anyone send me some scanned pictures of service manual for cadillac 1987? I´m looking for eletrical details for making my air conditioning works again. The 3 speeds of it are not working well. thanks

You dont have 3 speeds you have 3 positions, low auto and high. The fan is variable in speeds in auto. The likey culprit is the fan power module located under hood in the A/C box. It gets signals from the module within the dash to turn on the fan then vary its speed. Same power module is used on Eldos and Sevilles during the Allante years.