rear defroster contact soldering

webshot · Jan 22, 2007

The driver side contact came off on my rear defroster for my 88GT. I want to go ina and just solder it back on. But I wanted to make sure that no special solder or process was involved before just going ahead and doing it.

Can I just fire up my soldering iron and get some regular solder to reattach this?

Roland69 · Jan 22, 2007

I would try a micro torch....they are way faster than the iron.

Roland69 · Jan 22, 2007

oh and also use some of the thin solder not the thick stuff so it melts faster.

stang&2Birds · Jan 23, 2007

Roland69 said:
I would try a micro torch....they are way faster than the iron.

A Micro Torch against a window? YIKES!!!

Use a Weller. Clean the contact and "wire" with Acetone. Use flux.

Shakerhood · Jan 23, 2007

The Method in the Service Manual tells you to park the car in the sun on a Hot Day and then use a Hair Dryer and heat around the area and then use the soldering iron and as soon as you are done go back to the hair dryer. I could not get mine to stick so I ended up using Metallic Glue specifically designed for gluing the tabs back on.

webshot · Jan 23, 2007

shaker, where can you find this metallic glue? It wont be hot where I am at for a while.

Shakerhood · Jan 24, 2007

I bought it from JC Whitney, I am almost ashamed to say I bought anything from there, but the stuff worked fine, its held up over the last couple years. You might try Autozone or another parts store to see if they carry it too.

stang&2Birds · Jan 24, 2007

If you don't want to use a Weller solder gun, you can use conductive epoxy.

http://www.mgchemicals.com/products/8331.html
View attachment 408417
Silver Conductive Epoxy
8331
Forms high strength conductive bonds
This two part silver epoxy offers high electrical conductivity and strong conductive bonding. Use in place of traditional soldering on heat sensitive components. Good for repairing defective traces and creating jumpers on boards. Can be used as an effective heat sink adhesive. This Conductive Silver Epoxy comes in two 7g syringes.
Specifications
Specification Test Method Result
Minimum operating temp. -30°C ( -22 °F )
Maximum operating temp. 90°C ( 194°F )
Cure time @ 24°C (75°F) 4 hours
Cure time @ 65°C (150°F) 10 minutes
Working time @ 22°C 10 minutes
Volume resistivity @ 25°C MIL-STD-883E 0.38 ohm · cm
Tensile strength ASTM-D-638-02A 911 psi
Elongation ASTM-D-638-02A 0.3 %
Compressive Strength ASTM-D-695-02A 1100 psi
Flexural Strength ASTM-D-790-03 2,500 psi
Shear Strength ASTM-D-732-02 234 psi
Available Sizes
Catalog Number Sizes Available Description
8331-14G 14g (0.35 oz) Two 7g syringes, 3ml each

Mouser carries it:
http://www.mouser.com/search/ProductDetail.aspx?R=8331-14Gvirtualkey59020000virtualkey590-8331-14G
Product Information
Mouser Part #: 590-8331-14G
Manufacturer Part #: 8331-14G
Manufacturer: MG Chemicals
Description: Epoxy Compounds EPOXY - ELECTRICALLY SILVER CONDUCTIVE
Ordering Information
Stock: 2 Can Ship Immediately
On Order: ---
Pricing: 1: $19.95

Or, from Newark:
http://www.newark.com/jsp/search/productdetail.jsp?sku=00Z1602
Manufacturer: ITW CHEMTRONICS
Newark InOne Part Number: 00Z1602
Manufacturer Part No: CW2400
Description
Adhesive Compound
Leaded Process Compatible:Yes
Features:Conductive Silver Epoxy Provides Excellent Electrical Conductivity and High Thermal Conductivity, High Strength Bonding and Repairs ,Quick Solderless Electronic Connections Availability: 330
Price For: 1 Each
Price: $37.64

Roland69 · Jan 24, 2007

stang&2Birds said:
A Micro Torch against a window? YIKES!!!

Use a Weller. Clean the contact and "wire" with Acetone. Use flux.

done it before with no issues.....the solder melts fast

If you ever go to get a stone chip in a windshield fixed tey sometimes heat the area on the window with a micro torch first....just dont hold it in one spot for too long.

rear defroster contact soldering

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