1. Check the Fuse Again:
* Correct Fuse: Make absolutely sure you're replacing the fuse with the correct amperage. The owner's manual will specify the correct rating. Using a higher amperage fuse is dangerous and could lead to a fire.
* Fuse Holder: Inspect the fuse holder itself for damage, corrosion, or loose connections.
2. Identify the Specific Circuit:
* Multiple Windows Affected? If all the power windows are affected, the problem is likely in the main power window circuit or the fuse box itself. If only one window is affected, the problem is isolated to that window's wiring.
3. Visual Inspection:
* Wiring Harness: Carefully examine the wiring harness for each window motor. Look for:
* Chafing: Wires rubbing against metal parts.
* Broken Insulation: Exposed wires.
* Corrosion: Green or white deposits on the wires or connectors.
* Pinch Points: Wires squeezed or trapped.
* Loose Connections: Look at the connectors at both ends of the wiring harness – the ones at the window switch and at the motor itself.
* Window Motors and Regulators: Inspect the motors and regulators for any signs of damage or debris that might cause a short.
4. Testing (Requires a Multimeter):
* Continuity Test: If you have a multimeter, you can test the continuity of the wiring harness for each window. This will help pinpoint a break in the wire. Caution: Disconnect the battery negative terminal before performing any electrical tests.
* Voltage Test: With the fuse replaced, test for voltage at the window switch and at the motor connector. If you don't have voltage at either point, the problem is before that point in the circuit. If you have voltage at the switch but not the motor, the problem is between the switch and the motor.
5. Possible Causes and Solutions:
* Shorted Window Motor: This is a common cause. The motor itself might be faulty, causing a short circuit. Replacement is necessary.
* Faulty Window Switch: A malfunctioning switch can also draw excessive current, blowing the fuse. Replacing the switch is the solution.
* Wiring Issues: Repair or replace any damaged or frayed wiring. This might involve splicing in new wire sections.
* Door Harness Problems: The wiring harness within the door itself can get damaged due to wear and tear, especially near the flexing points where the door closes.
6. Professional Help:
If you're uncomfortable working with car electrical systems, it's best to take your Cobalt to a qualified mechanic. They have the tools and expertise to diagnose and repair the problem safely and efficiently.
Important Safety Note: Always disconnect the negative battery terminal before working on any car's electrical system. This prevents accidental shocks and shorts.
