Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
DEFINITION:
| ||||||||
1 | Did you review the HVAC blower operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms | ||||
2 |
Does the blower motor operate? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||
3 |
Does the test lamp illuminate? | -- | Go to Step 4 | Go to Step 9 | ||||
4 | Connect an J 35616-200 unpowered test lamp between the auxiliary blower motor low speed relay connector, cavity C2 for CKT 341 (BRN), and ground. Refer to Circuit Testing in Wiring Systems. Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 10 | ||||
5 |
Is continuity present? | -- | Go to Step 6 | Go to Step 11 | ||||
6 | Connect a J 39200 DMM between auxiliary blower motor resistor pin A and pin D. Refer to Circuit Testing in Wiring Systems. Is the resistance equal to or less than the specified value? | 3 ohms | Go to Step 7 | Go to Step 13 | ||||
7 | Connect a J 39200 DMM between auxiliary blower motor low speed relay connector cavity A1 for CKT 1926 (DK BLU) and ground. Refer to Circuit Testing in Wiring Systems. Is continuity present? | -- | Go to Step 14 | Go to Step 8 | ||||
8 |
Is continuity present? | -- | Go to Step 12 | Go to Step 15 | ||||
9 | Repair the open in CKT 1542 (RED) between splice S412 and the auxiliary blower motor low speed relay connector. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | -- | ||||
10 | Repair the open in CKT 341 (BRN) between splice S405 and the auxiliary blower motor low speed relay connector. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | -- | ||||
11 | Repair the open in CKT 1176 (YEL) between the auxiliary blower motor low speed relay connector and the auxiliary blower motor resistor connector. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | -- | ||||
12 | Repair the open in CKT 1926 (DK BLU)/60 (YEL) between the auxiliary blower motor low speed relay connector and the auxiliary blower motor switch connector. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | -- | ||||
13 | Replace the auxiliary blower motor resistor. Refer to Auxiliary Blower Motor Resistor Replacement . Did you complete the repair? | -- | Go to Step 16 | -- | ||||
14 | Replace the auxiliary blower motor low speed relay. Did you complete the repair? | -- | Go to Step 16 | -- | ||||
15 | Replace the auxiliary blower motor switch. Refer to Control Assembly Replacement - Auxiliary . Did you complete the repair? | -- | Go to Step 16 | -- | ||||
16 | Operate the auxiliary blower motor in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 | ||||
