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Author Topic: Any way to Reattach lug to Hatchback Heated Glass  (Read 273 times)

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Offline Henrius

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Any way to Reattach lug to Hatchback Heated Glass
« on: November 17, 2019, 09:02:43 PM »
I pulled a heated hatch glass years ago from a junkyard car. Glass like that is so rare!


Had it installed when my Pinto was painted. When I attached the power cable- the lug broke loose from the glass! Now the heated glass I spent so much time looking for is non-functional.


Can these lugs be silver-soldered back on? Will I have to remove the glass? Glass isn't a real good conductor of heat.  Or is there a glue that would work that would transmit electricity?
1973 Pinto Runabout with upgraded 2.0 liter & 4 speed, and factory sunroof. My first car, now restored, and better than it was when it rolled off the assembly line!

Offline LongTimeFordMan

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #1 on: November 18, 2019, 12:48:04 AM »
Do a google or yahoo search for adhesives with silver fillers

There are several types made for repairing printed ircuits and equipment that cannot be soldered.

In any case if you can solder the lug back on use standard low temp 60/40  tin lead rosin core elecfrical.sol der.

https://www.amazon.com/RadioShack-Rosin-Core-Solder-0-050-Diameter/dp/B007Z7QFDM

Also be careful not to dislodge or break the contact pad or heating element.

If you have not soldered before get a kit like this

https://www.northerntool.com/shop/tools/product_200642637_200642637?&cm_mmc=Google-LIA&gclid=EAIaIQobChMIg5mv0ZLz5QIVmB-tBh3lswNIEAQYDyABEgINjvD_BwE&utm_campaign=Ironton&utm_content=43984&utm_medium=Electrical%20%3E%20Electrical%20Tools%20%3E%20Kits&utm_source=Google_LIA

And practice getting a good smooth shiny pool of solder on some copper foil or strips or tin cans  before you tackle the window.

Again.. be very careful to not damage the existing pad or element they are fragile and can be dislodged from the window easily.

Do not try to use "silver solder" because it requires very high temps in the range of 1200 to 1600 farenheit and a torch.which might even melt the window.

Silver solder is used by experienced folks to join parts that require mechanical strength

Red 1973 pinto wagon DD, SoCal desert car, Factory 4 speed, 3.40 gears, Stock engine, 14" rims and tires, 60 K original miles

Offline Wittsend

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #2 on: November 18, 2019, 10:41:17 AM »
Good advice above.  When I need to deal with repairing electrical traces I first get the solder to stick to all the surfaces before I attempt to connect them. With the traces on the window you might have to CAREFULLY scrape the coating off to get to a solderable surface. You likely will have to solder in a short bare copper jumper wire to reconnect the lug and the trace.

I would follow this order:

1. Get solder attached to all the surfaces (lug, short jumper wire, trace).

2. Solder the short jumper wire to the lug.

3. Epoxy the lug back onto the glass. You might have to unbolt the hatch and flip it over to facilitate that letting gravity work for you. Don't break the glass!

4. Solder the jumper wire to the trace using the minimum of heat necessary.

5. Reinstall the wire on the lug carefully. I would support the lug with my finger to minimize stress when installing.


It seems odd that most cars have these window heaters and yet here in So. Cal. I don't think I have EVER used them.

Offline LongTimeFordMan

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #3 on: November 18, 2019, 10:48:38 AM »
Good advice Wittsend..

I forgot to provide the specifics you did..

Ive been soldering so long that i sort of took that for granted. And would be lost without my old radio shack 100 watt gun and a roll of Kester solder. Use it almost every week for something.

But most folks no longer master that skill

BUt a couple of years ago I taught my grandson to solder. He was about 14 at the time..

He was in a robotics class in HS and the teacher was impressed that he knew how.

BTW Wittsend are yiu camiliar with Apex electronics in Sun Valley and All Elecfronics in Van Nuys. Alsk.Luky's hardware in Burbank they have mostly screws bolts and misc small.stuff.al l.surplus

Before i came to.texas i lived in sun valley by the airport and bought a lot of stuff from them
Red 1973 pinto wagon DD, SoCal desert car, Factory 4 speed, 3.40 gears, Stock engine, 14" rims and tires, 60 K original miles

Offline Henrius

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #4 on: November 18, 2019, 11:09:54 AM »
Thanks for this valuable into, Wittsend and LongTimeFordMa n.  Do y'all think the heat generate would necessitate removing the glass from the hatch, or would merely removing the hatch to set it on a horizontal table be sufficient?
1973 Pinto Runabout with upgraded 2.0 liter & 4 speed, and factory sunroof. My first car, now restored, and better than it was when it rolled off the assembly line!

Offline Wittsend

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #5 on: November 18, 2019, 11:13:50 AM »
Yes, both Apex and ALL are places I consider "Men's Shopping." My son frequents them more than I do today.  In some ways he is a throwback to the 1950's in terms of skills.  He CAD draws, machines (mostly CNC), welds, 3-D prints. Here is a cued up You Tube video of us at ALL Electronics (I had just been to Pick Your Part).  They wouldn't let him shooting Apex. https://youtu.be/CvMub2SKVNg?t=442


I learned to solder when I raced slot cars in the late 60's/early 70's before most all the tracks folded. And for 9 years I was the TV Studio technician at the college I eventually taught at. So, I was able to take a hobby skill and make it an employable skill.

Offline LongTimeFordMan

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #6 on: November 18, 2019, 11:14:47 AM »
Henrius

Im not familiar with the specifics of the attachment

If you could provide some pix of the area i think we could provide you with some more specific info about how to do the repair
Red 1973 pinto wagon DD, SoCal desert car, Factory 4 speed, 3.40 gears, Stock engine, 14" rims and tires, 60 K original miles

Offline Wittsend

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #7 on: November 18, 2019, 11:18:39 AM »
If you have put the iron on the trace for 2-3 seconds to apply solder that will be a lot. Once the parts have solder on the (BTW, that is called "tinning") it will probably be 1/2 to 1 second to connect a jumper wire to the trace. At that point you are simply melting solder to solder. So, it is just an estimation that the glass will be fine but I don't see it as an issue. The fine lines is getting enough heat for a proper solder bond and minimizing heat so the traces don't start lifting.


Lastly I didn't mention it but use a flux paste. I find it helps a lot over just using the solder with the flux built in.

Offline LongTimeFordMan

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #8 on: November 18, 2019, 11:24:37 AM »
Getting a little off subject but Luky's hardware on Burbank blvd in burbank is another great place.

They have bolts by the pound and heavy duty hoses, fittings and stuff..

Every time i get a chance to go back to LA i stock up.
Red 1973 pinto wagon DD, SoCal desert car, Factory 4 speed, 3.40 gears, Stock engine, 14" rims and tires, 60 K original miles

Offline Wittsend

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #9 on: November 18, 2019, 11:34:09 AM »
Yep, I used Luky's to purchase a lot of the suspension bolts on my Sunbeam Tiger. And what I didn't get there I got down the street at Allen Bolt.  To those that are following this post LTFM and I are making reference to the many places in the San Fernando Valley (California) that sell items that are helpful to modifying or keeping our cars on the road.

 So, my apology for drifting off the subject. But I believe we have covered the original question and these establishments might be helpful for others to know of.

Offline LongTimeFordMan

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #10 on: November 18, 2019, 11:42:43 AM »
Also sorry for drifting but fo anyone interested in finding cheep electronic parts like connectors and misc  all electronics has a mail order catalog at

allelectronics .com
Red 1973 pinto wagon DD, SoCal desert car, Factory 4 speed, 3.40 gears, Stock engine, 14" rims and tires, 60 K original miles

Offline Henrius

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #11 on: November 18, 2019, 12:44:24 PM »
If you have put the iron on the trace for 2-3 seconds to apply solder that will be a lot. Once the parts have solder on the (BTW, that is called "tinning") it will probably be 1/2 to 1 second to connect a jumper wire to the trace. At that point you are simply melting solder to solder. So, it is just an estimation that the glass will be fine but I don't see it as an issue. The fine lines is getting enough heat for a proper solder bond and minimizing heat so the traces don't start lifting.


Lastly I didn't mention it but use a flux paste. I find it helps a lot over just using the solder with the flux built in.

I have soldered with resin solder a lot. Wasn't worried about the glass, but the rubber weatherstrip holding the glass. Don't know if the glass would conduct enough heat to burn the rubber.
1973 Pinto Runabout with upgraded 2.0 liter & 4 speed, and factory sunroof. My first car, now restored, and better than it was when it rolled off the assembly line!

Offline LongTimeFordMan

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Re: Any way to Reattach lug to Hatchback Heated Glass
« Reply #12 on: November 18, 2019, 02:14:54 PM »
How far is the rub er crom the place you are soldering.

 And what sort of soldering iron are you using

If its more than 1/4" inch you shouldnet have a problem with  heat transfer if like Wittsend mentioned just tin both surfaces well and you shouod be able to join the pices in a few seconds or less anyway
Red 1973 pinto wagon DD, SoCal desert car, Factory 4 speed, 3.40 gears, Stock engine, 14" rims and tires, 60 K original miles

Offline Billnparts

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Any way to Reattach lug to Hatchback Heated Glass
« Reply #13 on: November 25, 2019, 05:28:31 PM »
Permatex makes a kit to reglue those tabs back on.


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