pakcam

The rear defrost doesn't work in my 03 Sunfire. The light doesn't come on the button when pushed but I hear a click. Fuses are good and wiring looks good at the rear window. Tried taking a voltage reading between the two connections at the window and had nothing. Don't seem to have any other electrical problems...yet! Anybody have an idea what I could try next before winter sets in?

ChemMan

With the power to the rear defroster on, check both connections to a ground in the car. One should show about 12V, the other should show about 0V. If both show 0V, then your supply is broken somewhere. If you get 12V and 0V, but it doesn't work, then you've got a bad ground, or all the window elements are broken.

__________________
1995 Buick Lesabre Custom 73000 miles
2002 Pontiac Sunfire SE 103000 miles
1997 Pontiac Bonneville SE 91106 miles Totaled by attempt to steal the car!!
R.I.P. 1978 Ford Fairmont 83000 miles
FTN

pakcam

Thanks. It doesn't look like I have power, so I think I might try the switch next.