1. Preparation:
* Disconnect the battery: This is crucial for safety to prevent accidental shorts.
* Gather tools: You'll likely need various screwdrivers (Phillips and flathead), possibly some sockets and wrenches, and potentially a panel removal tool to avoid scratching the plastic. A flashlight is essential.
* Consult a repair manual: A Haynes or Chilton manual specifically for a 1979 Pontiac Trans Am is highly recommended. These manuals provide detailed diagrams and instructions tailored to your car, which are far superior to general instructions.
2. Accessing the Blower Motor:
* Remove the glove box: This usually involves removing screws or clips holding it in place.
* Remove the radio: This will likely require removing the bezel around the radio.
* Remove the dashboard panels: This is the most labor-intensive part. You'll need to carefully remove various trim pieces and panels on the passenger side of the dashboard, working your way towards the blower motor. Be gentle to avoid breaking any plastic clips. Again, your repair manual will show you the exact sequence. Expect to remove panels around the heater core and possibly even some under the dash.
* Locate the blower motor: Once you've exposed enough of the area, you should see the blower motor housing. It's usually held in place with screws or bolts.
* Disconnect electrical connections: Before removing the motor, disconnect the electrical connector(s) going to the blower motor.
3. Removing and Replacing the Blower Motor:
* Remove the blower motor: After disconnecting the electrical connections, carefully remove the screws or bolts holding the blower motor in place. You may need to maneuver the motor carefully to clear any obstructions.
* Install the new blower motor: Reverse the removal process to install the new blower motor. Ensure all electrical connections are securely reconnected.
* Reassemble the dashboard: Carefully reinstall all the dashboard panels, the radio, and the glove box.
Important Considerations:
* Take pictures: As you disassemble the dash, take pictures of each step. This will be invaluable when reassembling.
* Label wires: If you disconnect any wires, label them clearly to avoid confusion during reassembly.
* Patience is key: This is not a quick job. Take your time and be methodical to avoid damaging anything.
* Professional help: If you're not comfortable working on your car's electrical system or dashboard, consider taking it to a qualified mechanic.
This is a general guide. Always refer to a repair manual specific to your 1979 Pontiac Trans Am for precise instructions and diagrams. Improper disassembly can lead to damage. The manual will provide the detailed steps and show you precisely where all the clips, screws, and panels are located.
