Wiring connectors

2005 TOYOTA SIENNA
106,000 MILES • 3.3L • V6 • 4WD • AUTOMATIC
Avatar
PCULQUI
  • MEMBER
  • 354 POSTS
Are all butt connectors for car harness wiring shrinkage in the sense if a black 'Teflon' sleeve is applied over with a heat gun?
Jul 8, 2020 at 10:04 PM
Advertisement
Avatar
ASEMASTER6371
  • Experienced Mechanic
  • 52,796 POSTS
Good morning,

You can use shrink wrap on a butt connector but only on the ones that seal on both ends after installing.

You need the butt connector with solder in the middle. When you install the wires, you heat up the solder ring in the center and it will solder the wires together. It will also shrink the ends and seal the ends.. then you can use shrink wrap.

I think you are better off soldering the wires together directly and then using shrink wrap to cover it.

Roy
Jul 8, 2020 at 10:36 PM
Avatar
PCULQUI
  • MEMBER
  • 354 POSTS
I just purchased the butt connectors with solder in the center. Since I had previously purchased butt connectors, I made one connection which is not tight so I wanted to shrink that with 'Teflon' sleeve and do the rest with the butt connectors with the solder in the center.
Jul 8, 2020 at 11:12 PM
Avatar
ASEMASTER6371
  • Experienced Mechanic
  • 52,796 POSTS
Why the Teflon?

Can you post some pictures of the ones you have?

Roy
Jul 8, 2020 at 11:15 PM
Avatar
PCULQUI
  • MEMBER
  • 354 POSTS
okay, sure.
Jul 8, 2020 at 11:19 PM
Avatar
ASEMASTER6371
  • Experienced Mechanic
  • 52,796 POSTS
I would not use the first ones at all. They are not good connectors.

Solder and shrink wrap are the best way to join the wires.

Roy
Jul 8, 2020 at 11:24 PM
Avatar
PCULQUI
  • MEMBER
  • 354 POSTS
okay. Thanks.
Jul 8, 2020 at 11:43 PM
Avatar
ASEMASTER6371
  • Experienced Mechanic
  • 52,796 POSTS
You are welcome.

Always glad to help.

Roy
Jul 8, 2020 at 11:47 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.