Rear Defrost not working right

[TBRtat2]

I just had to replace my rear windshield, and the rear defrost is acting wierd. The top 2 lines work, and a small spot in the 4th or 5th line down works.

Yes I do have a good ground and I do have power coming to it.
And I do not see any broken spots in any of the lines.

So Is there anyting else to check? Or is this just a case of a bad defrost grid?

Also does anyone out there have a replacement belzel for around the defrost swtich for a blue dash?

 

[kustomkyle]

The defrost in my Regal went bad not long ago. Unlike yours it wouldn't work at all. The switch didn't light up anymore when I turned it on, and it wouldn't actuate the grid. I guess the spring in it went bad? I got a new switch from GM and it works like it should now. It seems like the switch is on a timer too, as it shuts off after a little while on it's own.

 

[TBRtat2]

I know my switch is working, the light comes on, and as I said there is power coming to the grid.

I noticed the switch turning it self off, I thought it was going bad, nice to know that it is suposed to do that.

 

[TBRtat2]

so is there anyone out there who has had this issue before?

 

[85 Cutlass Brougham]

I would try checking continuity across the grids that don't work with a volt/ohm meter.

 

[midwestls]

x2 on that sometimes the bars might have very little breaks in them (especially if the windows been cut out and replaced)

 

[TBRtat2]

No mater were i check it, the reading on the meter are the same ( the conecting strips at either end will read the same no mater which lines are bad, also i have a couple of small spots that work in the middle of the lines.

I dont beleave that there are breaks, I beleave that the grid has just worn out.

 

[midwestls]

I guess I've never seen it but it's not impossible. Everything eventually wears out I guess

 

[TBRtat2]

I have never seen it before either. (And I used to work as an ASE certified mechanic)
But I am just at a loss for whats wrong.

 

[midwestls]

I'll ask around alittle more and see if I can come up with anything for ya