Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Horns System Check Performed? | -- | Go to Step 2 | Go to Horns System Check |
2 |
Does the test lamp light at both positions? | -- | Go to Step 3 | Go to Step 4 |
3 |
Does the test lamp light? | -- | Go to Step 5 | Go to Step 15 |
4 | Replace the underhood bussed electrical center (UBEC). Is the repair complete? | -- | Go to Horns System Check | -- |
5 | Using the J 35616 , connect a jumper between UBEC terminal 3 and terminal 5 at the horn relay. Does the horn sound? | -- | Go to Step 6 | Go to Step 7 |
6 | Replace the horn relay. Refer to Horn Relay Replacement . Is the repair complete? | -- | Go to Horns System Check | -- |
7 | Is the HORN fuse open? | -- | Go to Step 8 | |
8 |
Is battery voltage measured? | -- | Go to Step 9 | Go to Step 10 |
9 | Replace the horn. Refer to Horn Replacement . Is the repair complete? | -- | Go to Horns System Check | -- |
10 | Do not remove the jumper leads from horn terminal A and terminal B. Using the fused jumper to B+, probe terminal B at the horn. Does the horn sound? | -- | Go to Step 11 | Go to Step 13 |
11 | Inspect for an open or high resistance in CKT 1329 between terminal B of the horn and UBEC connector C4 terminal A6. Was an open or high resistance condition found? | -- | Go to Step 12 | Go to Step 4 |
12 | Repair the open or high resistance in CKT 1329. Is the repair complete? | -- | Go to Horns System Check | -- |
13 | Inspect for opens or high resistance conditions in ground CKT 150 or CKT 250. Was an open or high resistance found? | -- | Go to Step 14 | -- |
14 | Repair the open or high resistance in CKT 150 or CKT 250. Is the repair complete? | -- | Go to Horns System Check | -- |
15 |
Is DTC B2752 displayed as a current DTC? | -- | Go to DTC B2752 Horn Relay Coil Circuit Low in Body Control Systems | Go to Step 16 |
16 | Backprobe C211 terminal A11 using a jumper lead connected to ground. Does the horn sound? | -- | Go to Step 17 | Go to Step 18 |
17 | Repair the open or high resistance in CKT 28 from C211 terminal A11 through the horn switch. Is the repair complete? | -- | Go to Horns System Check | -- |
18 | Inspect for an open or high resistance in CKT 28 from C211 terminal A11 to UBEC connector C1 terminal E3. Is the circuit OK? | -- | Go to Step 4 | Go to Step 19 |
19 | Repair the open or high resistance in CKT 28 from C211 terminal A11 to UBEC connector C1 terminal E3. Is the repair complete? | -- | Go to Horns System Check | -- |
