REAR WINDOW DEFROSTER
2003 Pontiac Grand Am • V6 FWD Automatic • 145,000 miles
The rear window defroster only clears a spot about the size of a silver dollar after about 15 minutes of use. I have checked and there is voltage to the grid. As I check the voltage across the grid, I have full voltage up to the ground terminal. I checked the voltage at the ground terminal and there is a drop in voltage of 2-3 volts. I checked the ground wire with an ohm meter and it is fine. If I check the resistence between the ground terminal on the defroster and the grid, I get a reading of about 120 with the meter on the 10k scale. I am assuming the is a problem with the ground tab's connection with the grid. Is there a way to fix this without replacing the window or the whole defroster grid?
June 6, 2014.
June 6, 2014.
Chances are there are breaks in the grid itself. The only way I know of fixing it is replacement.
If you drop 2 or 3 volts on the ground side, something is causing it to drop.
1991 Toyota Tercel How to repair - rear defroster is not working, poor visibility.
1 answer • 1991 Toyota Tercel
Heater problem 1999 Ford Contour 4 cyl Two Wheel Drive Automatic The interior compartment fuse for the heater blower "blows" when I turn the fan setting to either floor/...
14 answers • 1999 Ford Contour
Heater problem 1994 Chrysler Concorde 6 cyl Front Wheel Drive Automatic 110000 miles I have problems with my front window defroster. For no reason at all my front and side window ...
1 answer • 1994 Chrysler Concorde
My daughter has a 2004 Chevy Cavalier. The miles are about 50.000 and the engine is 2.2 liter I think. The heater works but when it is switched over to defroster, the air doesn't blow ...
1 answer • Chevrolet Cavalier