The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-30-2020, 10:18 AM   #1
44SAA
Registered User
 
Join Date: Apr 2017
Location: Fort Worth
Posts: 111
1980 Mystery Wire

Can anyone assist in identifying this light green mystery wire running out of a grommet from my firewall? Equally curious about the striped wire appearing horizontal in the second picture. Thank you
Attached Images
  

Last edited by 44SAA; 12-30-2020 at 11:12 AM.
44SAA is offline   Reply With Quote
Old 12-30-2020, 05:20 PM   #2
Joe_63
Registered User
 
Join Date: Jan 2013
Location: Ontario, Canada
Posts: 9
Re: 1980 Mystery Wire

the green wire with the orange plug is a "test" for torque converter lockup and should go to a vacuum switch near the brake booster on the fire wall. The orange plug end doesn't actually go to anything. I'm not sure about the pink with black stripe at the moment
Attached Images
 
Joe_63 is offline   Reply With Quote
Old 12-31-2020, 08:33 AM   #3
Palf70Step
State of Confusion!

 
Palf70Step's Avatar
 
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,575
Re: 1980 Mystery Wire

IThe pink w/black lead is for the transmission kickdown switch. If it is used on that model, it will probably be on the firewall near where the orange wire goes. I believe the other end goes to the fusebox to get switched power
__________________
Bill
1970 Chevy Custom/10 LWB Fleetside
2010 Toyota Tacoma PreRunner SR5 Double Cab - DD

Member of Louisiana Classic Truck Club (LCTC)

Bill's Gallery
Life isn't tied with a bow, but it's still a gift.
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!
Palf70Step is offline   Reply With Quote
Old 12-31-2020, 01:01 PM   #4
44SAA
Registered User
 
Join Date: Apr 2017
Location: Fort Worth
Posts: 111
Re: 1980 Mystery Wire

Thank you Palf. If that is indeed the kick down should it go to ignition power fuse?
44SAA is offline   Reply With Quote
Old 12-31-2020, 02:35 PM   #5
Palf70Step
State of Confusion!

 
Palf70Step's Avatar
 
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,575
Re: 1980 Mystery Wire

This is where it goes on my 81, which I imagine is the same and yes it is IGN connection
Attached Images
 
__________________
Bill
1970 Chevy Custom/10 LWB Fleetside
2010 Toyota Tacoma PreRunner SR5 Double Cab - DD

Member of Louisiana Classic Truck Club (LCTC)

Bill's Gallery
Life isn't tied with a bow, but it's still a gift.
Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!
Palf70Step is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:11 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com