Rear defroster switch does not illuminate. Cause?


ttn27

GT Owner
Sep 7, 2014
36
My rear defroster switch does not illuminate with the headlights turned on. All the other switches illuminate. What is the most likely cause?
It is a defective switch or a burned LED bulb? Is this a simple repair job? Thanks for all your help.
 

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GT101

*UK Support*
Supporting Vendor
Jan 20, 2010
380
Colchester, Essex, UK
We've seen a few switches where the illumination has failed.
New part is around $70 part number 4G7Z-18C621-AA.
The switch is a plastic assembly not designed to be disassembled.
 

ttn27

GT Owner
Sep 7, 2014
36
We've seen a few switches where the illumination has failed.
New part is around $70 part number 4G7Z-18C621-AA.
The switch is a plastic assembly not designed to be disassembled.

So the part number above is for a whole new switch? If I am able to get the part, is it easy to replace, i.e. DIY or do I have to bring it into the dealer?
 

GT101

*UK Support*
Supporting Vendor
Jan 20, 2010
380
Colchester, Essex, UK
Yes that's the part number for just that switch.

It's a fiddly thing to swap - you need to pull the lower dash panel and then it's a case of working with your head under the dash to get to the retaining nuts for the bracket that holds all of the switches in. They are mounted together then you can unclip the problem one and snap in an new one.
 

ttn27

GT Owner
Sep 7, 2014
36
Yes that's the part number for just that switch.

It's a fiddly thing to swap - you need to pull the lower dash panel and then it's a case of working with your head under the dash to get to the retaining nuts for the bracket that holds all of the switches in. They are mounted together then you can unclip the problem one and snap in an new one.

Thanks
 

HiloDave

GT Obsessed
Mark II Lifetime
Dec 7, 2005
928
Hilo, Hawaii
There's a rear defroster?
 

soroush

Ford Gt Owner
Mark II Lifetime
Aug 8, 2007
5,256
have you tried tapping on the switch? it just might work :)
 

ttn27

GT Owner
Sep 7, 2014
36
have you tried tapping on the switch? it just might work :)

No, I haven't but I will...I don't think I am that lucky though.
 

Spirit

Heritage GT Owner
Mark IV Lifetime
Le Mans 2010 Supporter
There's a rear defroster?
:lol:lol:lol:lol:lol
 

Tomcat

GT Owner
There's a rear defroster?

I think its called a dehumidifier in Hawaii (and Florida).
 

BlackICE

GT Owner
Nov 2, 2005
1,416
SF Bay Area in California
There's a rear defroster?

I would think you would need it in Hilo given how often it rains.