Step  | Action  | Value(s)  | Yes  | No  | 
|---|---|---|---|---|
1  | Did you perform the Horn Diagnostic System Check?  | --  | Go to Step 2  | |
2  | 
 Does the test lamp illuminate for the left horn?  | --  | Go to Step 4  | Go to Step 5  | 
3  | Repair the open in CKT 29 (DK GRN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?  | --  | Go to Step 11  | --  | 
4  | Connect a test lamp between the left horn connector CKT 250 (BLK) cavity A to CKT 29 (DK GRN) cavity B. Does the test lamp illuminate?  | --  | Go to Step 7  | Go to Step 8  | 
5  | Does the test lamp illuminate for the right horn?  | --  | Go to Step 6  | Go to Step 3  | 
6  | Connect a test lamp between the right horn connector CKT 350 (BLK) cavity A to CKT 29 (DK GRN) cavity B. Does the test lamp illuminate?  | --  | Go to Step 9  | Go to Step 10  | 
7  | Replace the left horn. Refer to Horn Replacement . Did you complete the replacement?  | --  | Go to Step 11  | --  | 
8  | Repair the open in CKT 250 (BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?  | --  | Go to Step 11  | --  | 
9  | Replace the right horn. Refer to Horn Replacement . Did you complete the replacement?  | --  | Go to Step 11  | --  | 
10  | Repair the open in CKT 350 (BLK). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair?  | --  | Go to Step 11  | --  | 
11  | Operate the system in order to verify the repair. Did you correct the condition?  | --  | System OK  | Go to Step 2  |