Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
DEFINITION:
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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 14 | Go to Step 4 | ||||||
4 | Connect a J 35616-200 unpowered test lamp between auxiliary blower motor resistor connector cavity A for CKT 1176 (YEL) and ground. Refer to Circuit Testing in Wiring Systems. Does the test lamp illuminate? | -- | Go to Step 15 | Go to Step 5 | ||||||
5 | Connect a J 35616-200 unpowered test lamp between auxiliary blower motor resistor connector cavity C for CKT 1072 (LT BLU) and ground. Refer to Circuit Testing in Wiring Systems. Does the test lamp illuminate? | -- | Go to Step 16 | Go to Step 6 | ||||||
6 |
Does the auxiliary blower motor operate? | -- | Go to Step 7 | Go to Step 9 | ||||||
7 | Disconnect the auxiliary blower motor switch connector. Does the auxiliary blower motor cease operating? | -- | Go to Step 20 | Go to Step 8 | ||||||
8 |
Is continuity present? | -- | Go to Step 17 | Go to Step 21 | ||||||
9 | Connect the auxiliary blower motor medium speed relay connector. Does the auxiliary blower motor operate? | -- | Go to Step 10 | Go to Step 12 | ||||||
10 | Disconnect the auxiliary blower motor switch. Does the auxiliary blower motor cease operating? | -- | Go to Step 20 | Go to Step 11 | ||||||
11 |
Is continuity present? | -- | Go to Step 18 | Go to Step 22 | ||||||
12 | Disconnect the auxiliary blower motor switch. Connect a J 39200 DMM between auxiliary blower motor switch connector cavity D and cavity B. Refer to Circuit Testing in Wiring Systems. Is continuity present? | -- | Go to Step 19 | Go to Step 13 | ||||||
13 | Connect a J 39200 DMM between the auxiliary blower motor switch pin D and pin B. Refer to Circuit Testing in Wiring Systems. Is continuity present? | -- | Go to Step 20 | Go to Step 23 | ||||||
14 | Repair the short to voltage in CKT 1172 (YEL) between the following components:
Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
15 | Repair the short to voltage in CKT 1176 (YEL) between the auxiliary blower motor resistor connector and the auxiliary blower motor low speed relay connector: Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
16 | Repair the short to voltage in CKT 1072 (LT BLU) between the auxiliary blower motor resistor connector and the auxiliary blower motor medium speed relay connector. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
17 | Repair the short to ground in CKT 60 (YEL)/1926 (DK BLU) between the auxiliary blower motor switch connector and the auxiliary blower motor low speed relay connector. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
18 | Repair the short to ground in CKT 63 (TAN)/1925 (RED) between the auxiliary blower motor switch connector and the auxiliary blower motor medium speed relay connector. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
19 | Repair the short to ground in CKT 52 (ORN /1924 (WHT) between the auxiliary blower motor switch connector and the auxiliary blower motor high speed relay connector. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
20 | Replace the auxiliary blower motor switch. Refer to Control Assembly Replacement - Auxiliary . Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
21 | Replace the auxiliary blower motor low speed relay. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
22 | Replace the auxiliary blower motor medium speed relay. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
23 | Replace the auxiliary blower motor high speed relay. Did you complete the repair? | -- | Go to Step 24 | -- | ||||||
24 | Operate the auxiliary blower motor in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 | ||||||
