Heated Rear Window Not Working

[john40]

Hi can anyone help please, the rear screen does not demist when i put the switch on i get the click to say its on and the lighs on the switch but nothing happens, i checked the wires in the back door with a multi meter from the junction box to the  screen and there is life to both sides, when i switch the button on there is no power to the wire at the backin the cubyhole, the black wire.

i have searched all over the place and nothing except try fuse 51 and fuse 19 there ok but cant seem to find if there is a relay that my need changing ?

what i have allso notice when i look the doors on the remote tne indicators dont flash when i open the lock on the key fob they do flash.

I have a X reg mk2 2.3 petrol

Would apreciate all the help on this thanks

[daddyfixit]

check tailgate loom.

[chrispb123456]

As said the fault is usually in the tailgate gaiter, however relays for the rear screen heater and heated door mirrors is part of the GEM board and are not serviced separately.

The feed to the screen is white and the earth is black.

[john40]

Hi i have checked the wirring and and there is contniuity from the start of the black wire in the box where the jack is, the part that has the cluster of wires three conectors and the middle has the black wire is to the screen both wires. where is the GEM Board? 

[chrispb123456]

Inside the central fuse box.

Have a look at this post it shows the indicator relays being repaired on the GEM/MFU board.

http://www.fordgalaxy.org.uk/ford/topic/24047-howto-2003-ford-galaxy-indicator-relay-replacement/?do=findComment&comment=171442

Edited October 25, 2013 by chrispb123456

[john40]

Thanks all the link was good just a bit tec for me there is 1 or 2 fuses i need to check not just fuse 51, when you hear a click when you switch it on you think its a relay doing the biss not a ciurcut board. i think my car is coming to an end caint complain its been a taxi for the last 5 years bought it with 75000 its got 189000 on a x reg mk2 type.

[viperclive]

Don't give up on her, my p reg 2.3 ghiaX has just passed 230.000 miles! Have you taken rear trim off, unplugged demister, connect volt meter, turn ignition on and window, check for 12v. If no voltage there I would suggest trim off on rear pillar rhs to pick up same colour wire and check again, if voltage it's loom, if not then back to relays and fuses.

[chrispb123456]

They are relays you can hear but are part of the board, it's not unheard of but rarely does the board go faulty.

When testing for current at the window ideally use a  21 watt test lamp. 

[john40]

hi i stripped the boot of all caseing put a multi meter on the black wire at the wire in the side box bellow the lights upto the left and right side thinking it was the usual break int the wire but there was continuity going to both. the white and read wire is live but the thick black isint, is the thick black wire supose to be live or is one part of the screen live and earth?