Step  | Action  | Yes  | No  | 
|---|---|---|---|
Schematic Reference: Suspension Controls Schematics  | |||
1  | Did you review the Air Suspension operation and perform the necessary inspections?  | Go to Step 2  | |
2  | 
 IMPORTANT: The vehicle must be on a drive on hoist. 
 Does the test lamp illuminate?  | Go to Step 3  | Go to Step 6  | 
3  | Connect a test lamp between the ground circuit of the Air Suspension Compressor Assembly harness and a battery positive voltage circuit. Does the test lamp illuminate?  | Go to Step 4  | Go to Step 7  | 
4  | Disconnect both air spring supply tubes at the Air Suspension Compressor Assembly. Did the vehicle lower?  | Go to Step 5  | Go to Step 8  | 
5  | Replace the Air Suspension Compressor Assembly. Refer to Air Spring Compressor Replacement . Did you complete the replacement?  | Go to Step 10  | --  | 
6  | Repair open circuit on the Air Suspension Compressor Assembly battery positive circuit. Did you complete the repair?  | Go to Step 10  | --  | 
7  | Repair open circuit on the Air Suspension Compressor Assembly ground circuit. Did you complete the repair?  | Go to Step 10  | --  | 
8  | Carefully inspect air tube assemble for damage. Was any damage found?  | Go to Step 9  | --  | 
9  | Repair or replace any damaged componets. Is the repair complete?  | Go to Step 10  | --  | 
10  | Operate the system in order to verify the repair. Did you correct the condition?  | System OK  | |