The belt for the washer drum can be accessed by tipping the washer on its side and looking up from the bottom. The motor and transmission may also have a rubber coupler that could be checked during this inspection as well. If you see that the rubber belt or coupler is frayed, worn, or broken, you will need to buy a new belt and replace the old one. 

The best thing you can do as an action for a washer that smells like burning from electrical problems is to unplug the washer and call a professional electrician or appliance repair person. 

If you can open the top lid of the washer with a sparkling knife or flat head screwdriver and then spot where the water may be spilling onto the electrical components, you may be able to address the leak. The most common action that you can take is to patch or replace the water intake or drain tubing that goes into the washtub. Look for any damage or tubing that is missing. 

The small pump belt that connects the motor to the drain pump hole may need to be repositioned or replaced. The belt runs from the motor and can fray or break due to use and age of the belt. If you see any damage, replace the belt.

The belt can also come loose from the pulley system that holds it in place, causing friction that can make the washer smell like burning. In this case, the action to take is easy. All you have to do is reposition the belt back onto the channel of the pulley. 

The pulleys are meant to handle the friction of the belts leading from the motor of the washer. However, if they become damaged, worn, or too dirty for movement to take place without a lot of friction, they can cause the burning smell. 

The pulleys can be accessed from the underside of the washer and are the casings that the belts run through on their way around the washer tub or to the drains. Try to clean them of any debris. However, if you see that there are pieces of rubber or rubber dust under the washer when you move it, it may be time to replace the pulleys and belts together.