2. Faulty switch: If the power windows, stereo, and wipers all stopped working at the same time, it could indicate a problem with the master power switch. Check if the switch is functioning properly and making proper contact when activated.
3. Faulty relay: Relays are electrical switches that control the flow of current to various components. Locate the relays related to the power windows, stereo, and wipers and check if they are functioning properly.
4. Short circuit: A short circuit occurs when two wires carrying current come into contact, causing a sudden flow of electricity. Check for any signs of a short circuit in the wiring system that may be affecting these components.
5. Computer module: Some vehicles have computer modules that control the operation of electrical components like power windows, stereo, and wipers. Check if there are any issues with the computer module that may be causing these components to malfunction.
6. Faulty ground connection: Check the grounding points for the power windows, stereo, and wipers. Ensure that they are clean and making good contact with the vehicle's chassis to provide a proper electrical ground.
If you are not comfortable performing these checks yourself, it's best to take your vehicle to a qualified mechanic for proper diagnosis and repair.