Blower Motor Always On
WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Blower Motor Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views |
|||
| 1 | Did you review the Air Delivery Description and Operation and the Air Temperature Description and Operation perform the necessary inspections? | Go to Step 2 | Go to Symptoms - HVAC Systems - Manual |
| 2 | Operate the blower motor at each speed. Does the blower motor operate when turned to the OFF position? |
Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Remove the heater relay from the right instrument panel junction block. Does the blower motor run? |
Go to Step 4 | Go to Step 5 |
| 4 | Repair the short to voltage in the blower motor supply voltage circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 9 | - |
| 5 | Test that the heater relay is open between terminals 3 and 5 and that there is continuity between terminals 3 and 4. Did the relay test OK? |
Go to Step 6 | Go to Step 7 |
| 6 | Test the heater relay control circuit for a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 9 | Go to Step 8 |
| 7 | Replace the heater relay. Refer to Blower Motor Relay Replacement
. Did you complete the replacement? |
Go to Step 9 | - |
| 8 | Replace the blower switch. Refer to Blower Switch Replacement
. Did you complete the replacement? |
Go to Step 9 | - |
| 9 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |