Cadillac Repair: ac, ac plug, gages

Question
1989 deville no power at the ac plug in also get code f11 f12 f48 need help bad cleard the codes  

Answer
F11 = AC high side temp circuit problem.

F12 = AC LO side temp circuit problem. (A/C clutch).

F48 = Very low AC pressure in system.

Jumper the AC relay and using a set of AC gages see what your AC pressurese on the HI and lo sides.

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