Heated rear screen

[pandp38]

Hello, I have recently aquired a heated rear window to replace my current unheated and badly scratched window.I would like to check the heater is working prior to replacing but not knowing much about electrics is it a simple case of checking out continuity with a multimeter or what ?

Thanks
Paul 1990 1.9 DG

[nutbox]

Hi there,
Yes that should be fine,coz it is just like a circuit and should show resistance if there isn't a break in it.
Cheers dazz

[ronsrecord]

And then how should it be wired? Straight to switch/ fuse box/ earth?

[Mocki]

And then how should it be wired? Straight to switch/ fuse box/ earth?

Depends on what van it is going in really..... If it is going in a van that didn't have rear screen or rear wash wipe it will need a loom making up !

Assuming the OPs van is a panel conversion it will need feeding via a 40amp relay from the relevant fuse on the fuse board ,there is a route up the "a" pillar and along the inner roof channel where the interior light loom runs , switched in the signal wire with a switch with a warning light . You should only run the positive feed and use the chassis of the van as neg .

[kevtherev]

Hi there,
Yes that should be fine,coz it is just like a circuit and should show resistance if there isn't a break in it.
Cheers dazz

not quite..
if the break is on one of the pathways across the screen.. there are plenty of others

[Oldiebut goodie]

I spent ages typing a reply on exactly that then went out and lost it - saved me saying it!

[pandp38]

Thanks for the replies guys. Luckily wiring is in place to the rear screen so I will get new seal ordered ready for when I swap the screens over.

[richlaz]

To test it, you could probably just connect a 12v supply (obviously with suitable fuse/cable size)... you should be able to feel the heat on your finger

[Oldiebut goodie]

Just use a multimeter - it isn't difficult to find breaks.