How to Repair a Car Window Defroster

You may notice your car window defroster doesnt seem to be working right. It either leaves patchy places or it doesnt work at all. Do not worry. This is part of the wear and tear that you can expect from your vehicle. Often times your belongings in the back of the car will scratch the rear window glass. As a result, your car window defroster stops working.

Instructions

Check the Fuses

1

Check the fuse box to verify that the fuse is still working for the rear window defroster.

2

Test the fuse by using a voltmeter.

3

Replace the fuse with a fuse that is identical to it.

Repairing the Terminals

4

Locate the terminals on the edges of the rear window. If they are missing, you need to solder them back on.

5

Clean the glass with rubbing alcohol and a 60-40 rosin core solder. Acid core solder is not recommended as it will eat away your auto parts over time.

6

Heat your soldering gun and work as quickly as possible to solder the terminals back on by using a 200 watt soldering gun or iron.

7

Schedule an appointment to have a mechanic do the work for you if you are not comfortable with your soldering skills.