1. Check the Fuses: Start with the simplest. Consult your owner's manual to locate the fuse(s) for the power windows. Check for blown fuses and replace if necessary.
2. Test the Window Switch: Try the other window switches. If they work, the problem is likely with the driver's side switch itself. If none of the windows work, the problem is likely elsewhere in the system.
3. Check the Window Motor: This is more involved. You'll need to access the motor, likely by removing the interior door panel. There are usually several screws and clips securing it. Be careful not to break any of the plastic clips. Once accessed:
* Visual Inspection: Look for any obvious damage to the motor, wiring, or the regulator (the mechanism that moves the window).
* Manual Test (with caution): With the power disconnected, try manually moving the window up and down. This helps determine if the problem is with the motor or the regulator. If it moves freely, the motor is likely the culprit. If it's jammed or stiff, you likely have a regulator problem.
4. Inspect the Wiring: Carefully examine all wiring connected to the motor, switch, and regulator. Look for broken, frayed, or corroded wires. Pay special attention to the areas where the wires flex as the window moves.
5. Regulator Problems: The regulator is a complex mechanism. If it's seized or broken, you may need to replace it. This is usually more involved than replacing the motor.
6. Window Switch Repair/Replacement: If you've determined the switch is at fault, you might be able to repair it (depending on the type of switch and your skill). More commonly, you'll need to replace it.
7. Relay (Less Likely): There might be a relay controlling the power windows, but this is less common as a single point of failure. Your owner's manual or a wiring diagram might help you locate it.
Repair or Replacement Options:
* DIY Repair: If you're comfortable working on cars and have the necessary tools, you can attempt repairs yourself. Online resources (e.g., YouTube tutorials, repair manuals) can be very helpful. However, accessing and repairing the window mechanism can be tricky.
* Professional Mechanic: If you lack the skills or tools, taking it to a mechanic is the safer option. They have the experience and equipment to diagnose and repair the problem efficiently.
* Parts Sourcing: Parts for a 1996 Buick Riviera might be challenging to find new. You may need to search online auto parts retailers or junkyards for used parts.
Before you start: Disconnect the negative battery terminal to prevent accidental shorts and shocks. Always refer to a repair manual specific to your vehicle for detailed instructions and diagrams. Working on car electrical systems can be dangerous if you're not familiar with the procedures.
