1. The Basics – Easy Checks First:
* Check the obvious: Does the problem affect all windows, or just one or two? This helps narrow down the issue. If it's just one window, the problem is likely localized to that window's mechanism. If all windows are affected, it points to a more central problem (power, switch, etc.).
* Clean the switch: Use contact cleaner (electrical contact cleaner, not general purpose cleaner) on the window switch itself. Dirt and corrosion can cause intermittent contact. Spray it liberally, work the switch several times, and let it dry completely.
* Check the fuses: Consult your owner's manual to locate the fuse(s) for the power windows. Check for blown fuses. Replace any blown fuses with the correct amperage. If a fuse keeps blowing, there's a short circuit somewhere in the system—a more serious problem.
* Battery Voltage: A weak battery can cause intermittent electrical issues. Test the battery voltage. It should be above 12.6 volts when fully charged. Low voltage can especially affect power-hungry accessories like windows.
2. More Advanced Troubleshooting (Requires some mechanical aptitude):
* Window Switch: If the problem seems isolated to a specific window and cleaning the switch didn't help, the switch itself might be faulty. You can try swapping the faulty switch with one from another window (if they are the same type) to see if the problem moves with the switch. Replacing the switch is relatively straightforward, but requires some disassembly of the door panel.
* Window Regulator: The regulator is the mechanical mechanism that moves the window up and down. Intermittent problems could be caused by worn-out parts within the regulator (gears, cables, motor). Accessing the regulator usually requires removing the door panel. Inspect it for broken or frayed cables, stripped gears, or a sticking motor. Lubrication (with the correct lubricant for plastic gears) might help, but often replacement is necessary.
* Wiring Harness: Check the wiring harness connected to the window motor and switch. Look for broken wires, loose connections, or corrosion. Carefully inspect the wiring from the switch to the motor, particularly where it passes through the door jamb. Repair or replace any damaged wiring.
* Window Motor: The motor itself might be failing intermittently. This is more difficult to diagnose without specialized tools, but you could test the motor's voltage directly with a multimeter to see if it's receiving power when the switch is activated. A failing motor usually needs replacing.
* Ground Connections: Poor ground connections can cause intermittent electrical issues. Check the ground points for the window system; clean and tighten any loose or corroded connections.
* Body Control Module (BCM): In some cases, a faulty BCM (the car's central computer) can cause intermittent problems with various electrical systems, including power windows. This is a more advanced troubleshooting step and would require a diagnostic scan tool to check for BCM codes.
Important Notes:
* Safety First: Disconnect the battery negative terminal before working on any electrical components.
* Door Panel Removal: Removing door panels can be tricky; search online for a video tutorial specific to your 1994 Camaro. There are often hidden clips and screws.
* Wiring Diagrams: Obtain a wiring diagram for your 1994 Camaro. This will help you trace the wiring circuits for the power windows. You can find these online (often through a subscription service) or in a repair manual.
If you're not comfortable working on car electrical systems, it's best to take your Camaro to a qualified mechanic. Diagnosing intermittent electrical problems can be time-consuming and require specialized tools and knowledge. Starting with the simpler steps above will help narrow down the problem and hopefully save you time and money.
