Heated Rear Window fault finding ...

[Mistwraithuk]

Hi all,
Any electricians around? My rear heated window is not working, however the wing mirror demisting is ok. Checked the fuse, which I believe covers both, and that is fine.
Any ideas how to test the actual rear window element? And where is the connection ?
Thanks all,

 

[andybnwc]

multimeter or test probe

 

[Mistwraithuk]

Got one of those, any idea what sort of resistance i`m looking for ? Or maybe as long as its not to earth its ok ?
I`m guessing i could read amps with meter in the ciruit to check the connection is ok ?

 

[aragorn]

Put the meter in voltage mode and measure across the lugs on the screen with it on and see what you get.

If you get a voltage, then turn it off, disconnect the supply cable, and measure across the screen in resistance mode to see if you get a reading.

Its unusual for the entire screen to fail in one go, they usually drop "lines" over time.

 

[jcb]

i would check the wiring loom where the door opens and closes for any damage or breaks

 

[andybnwc]

check for power at the connector terminal in the corner of the screen if nothing i would start from the front ie maybe the switch is faulty.

 

[Mistwraithuk]

ok thanks guys, i`ll start probing around