Fixing the headlight switch mounting problem

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

LTC_

I'm Awesome
Joined
Oct 20, 2020
Messages
346
Reaction score
757
Location
Tampa Bay
Here's how I tackled this. I replaced 2 of the broken plastic pieces with 6-32 threaded aluminum standoffs and reinforced the 2 remaining with non-threaded aluminum standoffs. The non- threaded ones just snuggly slip over the remaining pieces and the threaded ones I used J-B Weld. Holding up so far. I also used J-B Weld to attach washers to reinforce the 4 mounting holes that hold the bezel in the dash because they were getting cracked and brittle. All these standoffs came from ACE hardware in their fastener bins.
You must be registered for see images attach
 

Kens1990K2500

One Piece At A Time
Joined
Jul 1, 2021
Messages
226
Reaction score
272
Location
Rhode Island
I used short-cut pieces of drinking straw as forms, so that I could build up little cylinders of Devcon Plastic Welder glue. That stuff sets quickly, but doesn't get brittle. I laid the switch on top and installed the screws, and let the glue set around them. Crazy strong.

All 4 pretty much completely broken off
You must be registered for see images attach


Drinking straw pieces cut to size
You must be registered for see images attach


Filled up with glue, switch and screws installed. And yeah it's a little crooked; I was super tired and got in a hurry. :(
You must be registered for see images attach


Interested in seeing your method too; it's an all-too-common damage area on the 88-94's.

Richard
I used this method (plastic welder, using drinking straw pieces as forms), and it worked great. It has been several months now and still holding strong. Thank you for the detailed write-up and photos.
 

FerrariGuy

Newbie
Joined
Aug 5, 2016
Messages
3
Reaction score
10
Location
USA
Just thought I'd add to this. I designed up a replacement bracket in Fusion and had it 3D printed in Nylon with an MJF printer (though I'm sure FDM would work as well). The part requires that the fragile original post be cut off and ground flush, then the new bracket can be superglued in. The file is here: https://www.thingiverse.com/thing:5833056

You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
 

fancyTBI

Some of my trucks run and drive
Supporting Member
Joined
Oct 7, 2018
Messages
2,503
Reaction score
6,777
Location
Northern IL
Just thought I'd add to this. I designed up a replacement bracket in Fusion and had it 3D printed in Nylon with an MJF printer (though I'm sure FDM would work as well). The part requires that the fragile original post be cut off and ground flush, then the new bracket can be superglued in. The file is here: https://www.thingiverse.com/thing:5833056

You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
Wow! Very cool of you to make and share the file with us. This seems like a great solution.
 

Gibson hvac

Newbie
Joined
Mar 16, 2024
Messages
1
Reaction score
0
Location
North Carolina
Yep, but that specific product is the only one I trust. Devcon Plastic Welder. I've used it in places I really didn't expect it to hold, like the screw bosses for cable-operated vent controls on an old BMW - lots of pressure put on some tiny screws. Also used it to reinforce some cracks in the defrost vent area across the middle of a 1995-1998 style dashboard in a super rough-riding 3500HD. Not many products I consider to be near magic, but this is one of 'em.

Richard
Is it still holding. I'm about to try it on my 93
 
Top