Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Has the Heater Blower Controls System Check been performed? | -- | Go to Step 2 | |
2 |
Does the auxiliary blower motor spin? | -- | Go to Step 3 | Go to Step 4 |
3 | Replace the auxiliary blower resistor. Refer to Auxiliary Blower Motor Resistor Replacement . Is the repair complete? | -- | -- | |
4 |
Is continuity present? | -- | Go to Step 6 | Go to Step 5 |
5 | Locate and repair the open in CKT 1172 (YEL) between the resistor connector and splice S402. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
6 |
Is continuity present in both positions? | -- | Go to Step 8 | Go to Step 7 |
7 | Replace the auxiliary HVAC control module front switch. Refer to Control Switch Replacement - Auxiliary . Is the repair complete? | -- | ||
8 |
Does the auxiliary blower motor operate in both positions? | -- | Go to Step 9 | Go to Step 10 |
9 | Replace both auxiliary blower motor relays. Refer to Auxiliary Blower Motor Relay Replacement . Is the repair complete? | -- | -- | |
10 | Locate and repair the open the circuit(s) between cavity 2 of the relay socket and the auxiliary HVAC control module, front switch. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- |
