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 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-25-2022, 07:20 PM   #1
Bubfn
Registered User
 
Join Date: Feb 2022
Location: St Cloud, MN
Posts: 36
What is this wire for and what is missing?

1971 K10, Auto, gauges, no tach, HEI.
Im trying to figure out what the bare wire at the bottom of the picture for? The other non connected wire has "resistance" printed on it, so that would have went to the coil, the purple wire to the starter, the green to the temp and tan to the brake warning light. Would it be for an oil light or temp light? Also, it looks like a couple wires are missing.
Attached Images
  
Bubfn is offline   Reply With Quote
Old 02-25-2022, 07:30 PM   #2
57taskforce
All about them K’s
 
57taskforce's Avatar
 
Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,487
Re: What is this wire for and what is missing?

http://67-72chevytrucks.com/vboard/s...d.php?t=185856

This should help, looks like an oil psi switch probably for the light to me.
__________________
Tyler
'57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888
'72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879
‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206
'98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s

Last edited by 57taskforce; 02-25-2022 at 07:39 PM.
57taskforce is offline   Reply With Quote
Old 02-25-2022, 07:54 PM   #3
Bubfn
Registered User
 
Join Date: Feb 2022
Location: St Cloud, MN
Posts: 36
Re: What is this wire for and what is missing?

I'm not sure if there is an oil warning light if there is an oil gauge. There are 2 warning lights in the cluster but neither one lights up when the key is turned on.
Bubfn is offline   Reply With Quote
Old 02-25-2022, 08:24 PM   #4
Killer Bee
Registered User
 
Killer Bee's Avatar
 
Join Date: Jan 2016
Location: Barber City, CA
Posts: 4,809
Re: What is this wire for and what is missing?

check the bulbs? continuity?
__________________
I started out with nothing - and I still have most of it
Killer Bee is offline   Reply With Quote
Old 02-25-2022, 08:55 PM   #5
Bubfn
Registered User
 
Join Date: Feb 2022
Location: St Cloud, MN
Posts: 36
Re: What is this wire for and what is missing?

The resistance wire is there, it's the brown colored wire and has "resistance" printed on it. There is a sending unit on the passenger side head that is for the transmission controlled spark (TCS) system. The temp sending unit for the gauge comes from the water outlet at the front of the manifold. Maybe it's for a oil pressure light?
Attached Images
 

Last edited by Bubfn; 02-25-2022 at 09:13 PM.
Bubfn is offline   Reply With Quote
Old 02-25-2022, 09:26 PM   #6
57taskforce
All about them K’s
 
57taskforce's Avatar
 
Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,487
Re: What is this wire for and what is missing?

Sorry I misread the schematic earlier. There isn’t a wire in that position next to the solenoid wire in the diagram. I’ll have to check my truck and see if I have one there. The schematic has been very accurate for me in the past.
__________________
Tyler
'57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888
'72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879
‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206
'98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s
57taskforce is offline   Reply With Quote
Old 02-26-2022, 06:33 AM   #7
BigBird05
Registered User
 
Join Date: Aug 2019
Location: Cheraw
Posts: 1,300
Re: What is this wire for and what is missing?

My service manual says it's a 20 gauge Brown wire circuit #4 That is a TCS feed.
BigBird05 is offline   Reply With Quote
Old 02-26-2022, 10:15 AM   #8
Bubfn
Registered User
 
Join Date: Feb 2022
Location: St Cloud, MN
Posts: 36
Re: What is this wire for and what is missing?

Okay, thanks
Bubfn 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 01:33 AM.


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