A windshield defroster is a very convenient device. It can help to eliminate fog, frost, or ice from the windshield without scraping, and even keep it from forming in most cases. If you suspect that your defroster is not working correctly, the best thing to do is follow a few simple troubleshooting steps to determine the cause of the problem. In most cases, it can be a fairly easy fix that you can perform yourself.
Check the fuse for the defroster. Consult the owner's manual if necessary to determine the location of the fuse. Use a volt meter if possible to ensure that the fuse is working.
Replace the fuse by pulling it out with the fuse puller in your fuse box. Obtain a replacement fuse from an auto store and put the new fuse in place.
Inspect the wiring coming from the fuse box if possible, and repair any problems with electrical tape.
Inspect the wire going directly to the defroster. This is usually connected to a tab that can sometimes become disconnected.
Use window defroster tab adhesive to repair the connection tab. Follow the instructions in the kit, as they can vary.
Inspect the defroster grid lines for damage. Use a window defogger repair kit to repair the grid lines if necessary. Follow the instructions for the kit.
