Rear Window Demister Fault? - Alfa Romeo Forum
You are currently unregistered, register for more features.    
 
Thread Tools
  (Post Link) post #1 of 6 Old 19-11-13 Thread Starter
Newbie
 
Join Date: Jul 2012
Location: United Kingdom
Posts: 7

Member car:

Giulietta

Rear Window Demister Fault?

Hi

I noticed this morning that when I pressed the demister button on the dash the button light came on as normal but the window did not demist/thaw.

Any ideas as to what the fault is? Could it be a fuse?

Many thanks

GJP
squackett is offline  
  3 Latest Threads by squackett
Thread Forum Last Poster Replies Views Last Post
Rear Window Demister Fault? Alfa Giulietta squackett 5 1619 19-11-13 13:53
Topping up oil Alfa Giulietta 2 629 25-02-13 12:12
Key Code Card ? - Giulietta 1.6 Lusso JTDM-2 Alfa Giulietta baggieboy68 4 893 17-07-12 18:08
Sponsored Links
Advertisement
 
  (Post Link) post #2 of 6 Old 19-11-13
Newbie
 
Join Date: Oct 2013
Location: United States
Posts: 3

Member car:

Honda

It is annoying when one day the rear window defroster (demister) works and the next not.

Try checking the easy items first. Take a look at the fuse, the location of which is likely shown in the vehicles manual. Check to see if the light comes on when the defroster switch is pushed. When you push the defroster switch you are likely to hear a click as the relay makes.

Assuming these items check out, next take a look at the tabs on the defroster. These tabs are normally located along sides of the defroster and connect the unit to the vehicle’s defrost circuit. A separated tab will stop your defroster cold. If you find a loose or hanging tab use the Frost Fighter Defroster Tab Bonding Kit to reattach the tab.


If the tabs check out as attached to the defroster then check to see if you have power at the defroster tabs. A multi-meter or 12 volt test lamp is handy here. Turn on the defroster and place the probes on each tab. You should see 12-13 volts across the tabs.

If you have power to the tabs it means that the defroster circuit is likely functioning and the fault is in the defroster. We have a good trouble shooting guide online here



Let us know what you find,

DOC

Last edited by classicgal93; 19-11-13 at 23:13. Reason: advertising without permission
DoctorDefroster is offline  
  (Post Link) post #3 of 6 Old 19-11-13
Club Member
 
Mito_No3's Avatar
 
Join Date: Aug 2009
Location: United Kingdom
Posts: 2,748
Images: 12
As the light is coming on shouldn't be a fuse possible. The wiring going through the loom at the tail gate is a common fault for breaking.
Mito_No3 is offline  
  (Post Link) post #4 of 6 Old 25-11-13
AO Member
 
Red Spider 156's Avatar
 
Join Date: Jan 2009
Location: United Kingdom
Posts: 138
It's a fault in the loom. I had mine replaced under warranty last year.
Red Spider 156 is offline  
  (Post Link) post #5 of 6 Old 27-11-13
AO Member
 
MakeTeaNotWar's Avatar
 
Join Date: Sep 2013
Location: United Kingdom
Posts: 277
I thought mine had stopped working, turned out there was a layer of dirt/oil on the inside that when in darker conditions and at night with the car behinds light shining it that gave it the impression of having condensation/frost on it that would never go away
MakeTeaNotWar is offline  
  (Post Link) post #6 of 6 Old 02-12-13 Thread Starter
Newbie
 
Join Date: Jul 2012
Location: United Kingdom
Posts: 7

Member car:

Giulietta

Thanks all. Getting it checked out under warranty on Fri so will keep you posted.
squackett is offline  
Reply

Go Back   Alfa Romeo Forum > Supported Alfa Romeo Models > Technical & Vehicle Assistance > Alfa Giulietta

Tags
demister , fault , rear , window

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome