Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the ALC Suspension System Check? | -- | Go to Step 2 | |
2 |
Does the vehicle lower? | -- | Go to Step 3 | Go to Step 7 |
3 | Test CKT 639 (PNK) at the load leveling height sensor for voltage. Is battery voltage present? | -- | Go to Step 4 | Go to Step 12 |
4 | Test CKT 1298 (LT BLU) at terminal C of the load leveling height sensor for voltage. Is battery voltage present? | -- | Go to Step 5 | Go to Step 13 |
5 | Test CKT 1350 (BLK) at the load leveling height sensor for an open circuit. Is an open present in CKT 1350 (BLK)? | -- | Go to Step 17 | Go to Step 6 |
6 | Replace the load leveling height sensor. Refer to Automatic Level Control Sensor and Bracket Replacement . Is the replacement complete? | -- | -- | |
7 | Test CKT 1840 (ORN) at terminal C of the load leveling pump for voltage. Is battery voltage present? | -- | Go to Step 9 | Go to Step 8 |
8 | Repair the open in CKT 1840 (ORN) between the load leveling pump and S474. Is the repair complete? | -- | -- | |
9 | Connect a fused jumper wire (backprobe) from terminal B, CKT 320 (WHT) at the load leveling pump to ground . Does the vehicle lower? | -- | Go to Step 10 | Go to Step 11 |
10 | Repair the open in CKT 320 (WHT) between the load leveling pump and the load leveling height sensor. Is the repair complete? | -- | -- | |
11 | Replace the air compressor head. Refer to Automatic Level Control Air Compressor Head Replacement . Is the replacement complete? | -- | -- | |
12 | Repair the open in CKT 639 (PNK) between the load leveling height sensor and S473. Is the repair complete? | -- | -- | |
13 | Test CKT 1840 (ORN) at the load leveling timer relay for voltage. Is battery voltage present? | -- | Go to Step 15 | Go to Step 14 |
14 | Repair the open in CKT 1840 (ORN) between the load leveling timer relay and S475. Is the repair complete? | -- | -- | |
15 | Test CKT 1298 (LT BLU) at the load leveling timer relay for voltage. Is battery voltage present? | -- | Go to Step 16 | Go to Step 18 |
16 | Repair the open in CKT 1298 (LT BLU) between the load leveling timer relay and the load leveling height sensor. Is the repair complete? | -- | -- | |
17 | Repair the open in CKT 1350 (BLK). Is the repair complete? | -- | -- | |
18 | Replace the load leveling timer relay. Refer to Automatic Level Control Relay Replacement . Is the replacement complete? | -- | -- |
