Cadillac Deville Suspension

[kgreenwood4]

2003 Cadillac Deville will not adjust ride height when extra weight is placed in rear of vehicle. Ran Diagnostic and it came up with a C0663 Code. This is the only trouble code and it continually stays on even when i reset it. I have replaced the ELC relay and checked all the fuses. Im not sure where the sensors ride height sensors are located. I dont know where i should start with issue. any help will be very much appreciated

 

[william hulbert]

ride sensor in rear of car underneath but your best bet take to dealer have the plug it in and tell you whats wrong then you can go to parts counter get part and put it in yourself

 

[bill57]

Does the compressor come on at all? If not, try running 12 volts to it directly from the battery and see if it goes on. If it does not, maybe the compressor is shot.