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 10-21-2004, 06:05 PM   #1
Yukon Jack
Post Whore
 
Yukon Jack's Avatar
 
Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,684
Engine wiring harness identification help needed

Well, my old harness has been out for a real long time and I am trying to figure out with the help of my manuals where each wire goes.

Here are the pics of both parts of the engine harness. One harness is set up for a new style 1 wire alternator.





I believe the wires go to these things:

1 ground
2 ground
3 horn
4 headlights
5 front turn or side marker
6 front turn or side marker
7 alternator plug
8 also for the alternator alternator ?
9 ground maybe
10 junction block on fender
11 junction block on fender
12 front turn or side marker
12a front turn or side marker
13 headlights
14 ground
15 distributor
16 appears to be for the oil pressure idiot light
17 starter posts
18 transmission - back up lights
19 temp sending unit
20 master brake cylinder
21 appears to be for the TSC

Other than the ones that I don't know, does it look like I have it figured out? Thanks for any help.
__________________
1970 Blazer with a 400 sbc and 4" lift
1980 Pontiac Trans Am, 455 Oldsmobile
2012 Kawasaki Concours 14

Last edited by Yukon Jack; 06-24-2010 at 11:20 AM.
Yukon Jack is offline   Reply With Quote
Old 10-21-2004, 08:16 PM   #2
JimKshortstep4x4
Senior Member
 
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
Smile

It looks like you pretty well have it figured out. Here is what the other terminals look like to me: 7) Alternator plug

16) Oil pressure light sender

21) Wiring for TSC

Jim
JimKshortstep4x4 is offline   Reply With Quote
Old 10-21-2004, 10:10 PM   #3
Yukon Jack
Post Whore
 
Yukon Jack's Avatar
 
Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,684
I don't think my 69 uses the TSC so I guess I ignore that.

For 16, I guess you mean that in addition to the mechanical oil pressure gauge there should be a light on the dash for loss of oil pressure?
__________________
1970 Blazer with a 400 sbc and 4" lift
1980 Pontiac Trans Am, 455 Oldsmobile
2012 Kawasaki Concours 14
Yukon Jack is offline   Reply With Quote
Old 10-21-2004, 10:18 PM   #4
landon4421
Life is Good !
 
landon4421's Avatar
 
Join Date: Mar 2002
Location: Hollister, Ca.
Posts: 1,992
The idiot light I think is what he is talking about
__________________
'72 Chevy C10 4x4 shortbed "Project"
'71 Chevy C10 2wd longbed "partsrunner"
'91 Chevy Burb 4x4 "kidrunner"
'14 Honda Accord Sport "commuter"
landon4421 is offline   Reply With Quote
Old 10-21-2004, 10:42 PM   #5
Yukon Jack
Post Whore
 
Yukon Jack's Avatar
 
Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,684
It's funny, it was a bit overwhelming when I was looking at the stuff last night but this morning when I took it with me to work to photograph it, it didn't seem that bad. Won't be getting to get it installed tonight, maybe some free time in the next few days.

I wasn't planning on having an idiot light for the oil - I keep a good eye on the oil pressure gauge, hope that isn't a mistake not to have an idiot light in addition to the oil pressure gauge.

Got the gauges wired up a few nights ago. I did have to move the speedo to the other side, forgot about how the speedo cable is routed.

__________________
1970 Blazer with a 400 sbc and 4" lift
1980 Pontiac Trans Am, 455 Oldsmobile
2012 Kawasaki Concours 14
Yukon Jack is offline   Reply With Quote
Old 10-21-2004, 11:20 PM   #6
jhow66
Registered User
 
jhow66's Avatar
 
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
I used the # 21 for a underhood light.(just turn ing. switch to ass.)
__________________
56 Chevy Bel-Air 2dr. HT (purchased new)
71 Chevy Cheyenne SWB PU (502HO)
65 GMC short bed step--work in progress and my gofer
jhow66 is offline   Reply With Quote
Old 10-21-2004, 11:49 PM   #7
Rollie396
someday it will be done!
 
Rollie396's Avatar
 
Join Date: Sep 2004
Location: Lloydminster,AB. Canada
Posts: 1,620
man those guages look good!What brand are they?
__________________
'72 C-10 Proud owner of a million new and used pieces that used to be and will once again be(god willing) a testament to the term "they don't build em like that anymore.
'80 LWB 2wd beater
'67 GMC long fleet (cab donor)
'66 long step (parked till it's turn comes around)
'65 short step (parts truck that will donate it's bed and possibly frame to the '66)
'06 Grand Prix wife's car (she hardly lets me touch it)
my pics
Rollie396 is offline   Reply With Quote
Old 10-22-2004, 08:30 AM   #8
JimKshortstep4x4
Senior Member
 
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
Yukon,

That is a good way to look at wiring harnesses. Your pics are very good and numbering the ends breaks it down so that the harness is understandable.

Jim
JimKshortstep4x4 is offline   Reply With Quote
Old 10-22-2004, 09:26 AM   #9
Yukon Jack
Post Whore
 
Yukon Jack's Avatar
 
Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,684
Assuming things are correctly identified maybe the pic and identification should go into the FAQ.

Rollie396 - the gauges are AutoMeter's Phantom series. I'm really liking how they look with the silver interior and black dash pad and bezel.
__________________
1970 Blazer with a 400 sbc and 4" lift
1980 Pontiac Trans Am, 455 Oldsmobile
2012 Kawasaki Concours 14
Yukon Jack is offline   Reply With Quote
Old 10-22-2004, 07:15 PM   #10
JimKshortstep4x4
Senior Member
 
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
Smile

Yukon,

Putting the pics and description into the FAQ's would be a good thing to do. Questions on harnesses come up all of the time and it is easier to understand than a schematic.

Jim
JimKshortstep4x4 is offline   Reply With Quote
Old 10-22-2004, 07:21 PM   #11
REPO1
Shortbox wanna-be.
 
REPO1's Avatar
 
Join Date: Mar 2002
Location: Fort St.John, British Columbia, Canada
Posts: 773
Thumbs up

Good Post!
__________________
1970 Chevy C20 Custom Camper
402BB Turbo 400 trans. (Slowly becoming a '70 shortbox 1/2 ton)
'71 Camaro SS 402/T400 resto
'97 Z28 (11.41@127MPH)
REPO1 is offline   Reply With Quote
Reply

Bookmarks


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 11:29 AM.


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