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Does anyone have a backlite heater?
#1
I was looking at the electrical drawings in the data section showing a backlite heater. Where is the switch and dashlite located? What do they do? There doesn't seem to be many parts for this anywhere.
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#2
71fast;214110 Wrote:I was looking at the electrical drawings in the data section showing a backlite heater. Where is the switch and dashlite located? What do they do? There doesn't seem to be many parts for this anywhere.

I have one. THe slang term is rear window defogger. Switch and indicator light are by your left knee on the lower dash,
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#3
71fast;214110 Wrote:I was looking at the electrical drawings in the data section showing a backlite heater. Where is the switch and dashlite located? What do they do? There doesn't seem to be many parts for this anywhere.

Here is a picture of mine. I have since replaced it since the switch was broken. Also replaced the "Belts" light which I was missing. Thanks to member Eddyw for selling me that hard to find part.

And yes the parts are hard to find. Switches can be rebuilt using a power top switch but you have to already have a switch to do that. The back glass with the heater grids is also rare and not reproduced. I picked up a nice one on Craigslist last year for next to nothing. Guy just wanted to get rid of it. I figured it was good to have a spare just in case!

   
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#4
I didn't think anybody would call a rear window a backlite. I never made the connection.
Do you know where the backlite relay is located? Maybe above the glove compartment?
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#5
Here is a not so great picture of mine. Like Mike, the knob was broken off when I purchased the car from the original owner. I had a spare switch in my stash of parts so that made replacing it pretty easy. They tend to break off when the drivers feet hit the switch on exiting from the car. I have to be real careful getting out of this car so I don't kick it and snap it off. The indicator light for the unit is just to the left of the switch and glows red when the defrost is on.
[Image: rric2g.jpg]
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#6
71fast;214118 Wrote:I didn't think anybody would call a rear window a backlite. I never made the connection.
Do you know where the backlite relay is located? Maybe above the glove compartment?

Yes the relay would be on the electrical plate above the glove box
Don

Ohio Mustang Supply
440-949-2556

[Image: oms_sig_banner.jpg]
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#7
71fast;214110 Wrote:I was looking at the electrical drawings in the data section showing a backlite heater. Where is the switch and dashlite located? What do they do? There doesn't seem to be many parts for this anywhere.

if you are interested:

http://www.ebay.com/itm/1973-Mustang-Hea...70&vxp=mtr

Eddy[attachment=29722]
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#8
eddyw;214174 Wrote:
71fast;214110 Wrote:I was looking at the electrical drawings in the data section showing a backlite heater. Where is the switch and dashlite located? What do they do? There doesn't seem to be many parts for this anywhere.

if you are interested:

http://www.ebay.com/itm/1973-Mustang-Hea...70&vxp=mtr

Eddy
Just info,
I have read somewhere that I think 7% or the Mach 1 and Sportsroof cars had the "Electric Rear Window Defroster" as stated on the window sticker. Don't know how they could come up with that. I had asked Marti to try to sort the data by options once and he said it was not set up to sort. My 73 Mach and 72 T-5 both have the option that cost $57.00 new. I did break the knob of my switch also with catching my pants leg on the handle. I think it was maybe 1975 and when I went to the dealer to get one he said they were not available. So I had him do a nation wide search for them at dealers and I think there were three so I bought all of them. That is another one of those parts that turned into gold.
Will watch the one on eBay to see if it sells.
David
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#9
For historical purposes I decided to post up the different wiring components of the defroster glass from the ebay ad.

   

   

   

   

   

Ray

1971 Boss 351  
1972 Q code 4 speed convertible 
1971 Mustang Sportsroof  351-2V FMX 
1973 Mach 1 (parts car)
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#10
A few photo's extra:
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