Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Test the HVAC control head supply circuit at the control head for battery voltage. Refer to Circuit testing in Wiring Systems. Is voltage present? | -- | Go to Step 2 | Go to Step 3 |
2 | With Ignition ON and engine OFF push the Recirculation button to the ON position. Test the Recirculation motor feed circuit at the HVAC control head for battery voltage. Refer to Circuit testing in Wiring Systems. Is voltage present? | -- | Go to Step 4 | Go to Step 5 |
3 | Repair open in HVAC control head supply circuit. Refer to Wiring Repairs in Wiring Systems Did you find and repair the condition? | -- | System OK | -- |
4 | With Ignition ON and engine OFF push the Recirculation button to the ON position. Test the Recirculation motor feed circuit at the Recirculation motor for battery voltage. Refer to Circuit testing in Wiring Systems. Is voltage present? | -- | Go to Step 6 | Go to Step 7 |
5 | Replace the HVAC control head. Refer to HVAC Control Assembly replacement. Did you complete the repair? | -- | System OK | -- |
6 | Test the Recirculation supply circuit at Recirculation motor for battery voltage. Refer to Circuit testing in Wiring Systems. Is voltage present? | -- | Go to Step 8 | Go to Step 9 |
7 | Repair the open in the Recirculation motor feed circuit between the control head and the recirculation motor. Refer to Wiring Repairs in Wiring Systems. Did you find and repair the condition? | -- | System OK | -- |
8 | Test the ground circuit at the Recirculation motor for continuity to ground. Refer to Circuit testing in Wiring Systems. Is the ground present? | -- | Go to Step 10 | Go to Step 11 |
9 | Repair the open in the Recirculation supply circuit. Refer to Wiring Repairs in Wiring Systems Did you find and repair the condition? | -- | System OK | -- |
10 | Replace the Recirculation Motor Assembly. Refer to Recirculation motor Assembly replacement. Did you complete the replacement? | -- | System OK | -- |
11 | Repair the open in the Ground circuit. Refer to Wiring Repairs in Wiring Systems. Did you find and repair the condition? | -- | System OK | -- |
