QuestionWhat is the best way to repair the defroster to working order. I have voltage to the window but the ground tab seems to fail in passing sufficient amperage/current to ground. I have tried the electric "paint" to no avail. Help!
AnswerYou need to find out where the break is; If the entire defroster isn't working (not just a part of it), then more than likely the thick vertical bar or the attachment tab itself has failed, and you need to find and fix each.
- If you use an ohm meter, and tap across the +/-, what reading do you get? If you don't get a low # of ohms, the break is still there in the pattern. You have to find and fix all the lines broken.
- If you do get ohms, then the break is somewhere in the wiring (since you have voltage to the window, this may not be a problem. I would double check you have a good path to ground
- try a jumper of the ground side to a known, clean ground with a heavy wire, and see if that passes enough to heat the strips
-Jumper a small battery to the grid itself to see if it heats up, indicating the problem is the car wiring/relay, and not the grid.
You may have to relegate yourself to replacing the whole defroster
Try reading through this link, and see if it helps your troubleshooting
http://www.frostfighter.com/fixit.htm
