Engine Harness Help-Ground Wire - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old Oct 28th, 11, 07:26 PM Thread Starter
Senior Tech
Brent
 
Join Date: Jun 2010
Location: Tulsa
Posts: 321
Engine Harness Help-Ground Wire

I just about got my engine harness put in (67 camaro w/ small block 350) then ran into a little snag when I got to the engine ground. The ground that I pulled off only had the purple wire connected and if you look at the pic you can see where the yellow wire was just cut off and taped. The new harness has both the purple and yellow wire. Why would the yellow wire be cut off? Should I not attach both the purple and yellow wire?





tbd67 is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old Oct 28th, 11, 07:47 PM
Admin/Super Moderator
Brian
 
69-Pace's Avatar
 
Join Date: Jun 2010
Location: Connecticut USA
Posts: 12,511
Garage
Re: Engine Harness Help-Ground Wire

These are your Coil wires. I think you need both unless I'm missing some modification you have where you don't need crank signal from ignition switch.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1969 Z11 Pace Car - L48 350cid/300hp - 4 Speed Muncie 12 bolt rear.

Super Moderator Team Camaro
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
to send me a private message

Last edited by 69-Pace; Oct 29th, 11 at 06:12 AM.
69-Pace is offline  
post #3 of 13 (permalink) Old Oct 28th, 11, 07:53 PM
Senior Tech
Dan
 
Join Date: Aug 2005
Location: Goodyear, AZ
Posts: 1,222
Re: Engine Harness Help-Ground Wire

Probably because you have an HEI ignition....do you?....


DR
Rack Man is offline  
 
post #4 of 13 (permalink) Old Oct 28th, 11, 09:29 PM Thread Starter
Senior Tech
Brent
 
Join Date: Jun 2010
Location: Tulsa
Posts: 321
Re: Engine Harness Help-Ground Wire

Well, I can tell you that whatever this yellow wire is that was coming off the old harness was not used. This have something to do with the HEI? I know that is a stupid question, but I never really knew what is what for.


tbd67 is offline  
post #5 of 13 (permalink) Old Oct 29th, 11, 06:16 AM
Moderator
Guess
 
HwyStarJoe's Avatar
 
Join Date: Jan 2001
Location: New Taxes York
Posts: 15,366
Re: Engine Harness Help-Ground Wire

You do not need that yellow wire if yer using an HEI distributor. That's why it was taped back. You do not need that fabric covered resistor wire either.
They went to the stand-alone coil for the points distributor setup. The give away is the pronged spade connector on them.

*---------------------------------*


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

HwyStarJoe is offline  
post #6 of 13 (permalink) Old Oct 29th, 11, 08:46 AM Thread Starter
Senior Tech
Brent
 
Join Date: Jun 2010
Location: Tulsa
Posts: 321
Re: Engine Harness Help-Ground Wire

Okay, cool. Thanks. Last question is this new harness has this metal adapter on it, which the original one I pulled out did not. What is this for? Does this bolt to the motor somewhere or something? The original wire went through a tube down by the bottom of the motor and the ground came out through this and attached to the lower side of the block. Anyone know what this piece goes to?

tbd67 is offline  
post #7 of 13 (permalink) Old Oct 29th, 11, 09:49 AM
Gold Lifetime Member
Mike
 
prostreet69camaro's Avatar
 
Join Date: Jul 2003
Location: Spring Texas
Posts: 5,580
Re: Engine Harness Help-Ground Wire

Quote:
Originally Posted by tbd67 View Post
Okay, cool. Thanks. Last question is this new harness has this metal adapter on it, which the original one I pulled out did not. What is this for? Does this bolt to the motor somewhere or something? The original wire went through a tube down by the bottom of the motor and the ground came out through this and attached to the lower side of the block. Anyone know what this piece goes to?

It bolts into one of the transmission mounting holes. It is to hold the harness from the exhaust. You have 2 bolts on the side. I believe it goes into the upper hole. The little tab is so it grabs the housing and doesn't rotate when you tighten up the bolt.

I am assuming this is the wires to the starter.

Mike
69 Camaro Prostreet - purple w/ghost flames , 502 w/ 871 blower


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
prostreet69camaro is offline  
post #8 of 13 (permalink) Old Oct 29th, 11, 10:09 AM
Moderator
Guess
 
HwyStarJoe's Avatar
 
Join Date: Jan 2001
Location: New Taxes York
Posts: 15,366
Re: Engine Harness Help-Ground Wire

That's what it looks like to me.

*---------------------------------*


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

HwyStarJoe is offline  
post #9 of 13 (permalink) Old Oct 29th, 11, 10:14 AM
Senior Tech
Al
 
Join Date: Nov 2002
Location: Vancouver, USA
Posts: 10,514
Re: Engine Harness Help-Ground Wire

Back to your original post - the purple wire is not an engine ground! It goes to the "S" terminal on your starter motor, which is the small terminal on the solenoid closest to the engine block. As said the yellow wire isn't needed becuase you have GM type HEI distributor.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
BPOS is offline  
post #10 of 13 (permalink) Old Oct 29th, 11, 06:20 PM Thread Starter
Senior Tech
Brent
 
Join Date: Jun 2010
Location: Tulsa
Posts: 321
Re: Engine Harness Help-Ground Wire

Okay, I said ground only because I assumed that's what it was. The existing purple wire that I removed was on the passensger dide of the block close to the bottom. The original wire harness was fed through a tube and came out on the passenger side if the block and was mounted to the block with a small nut.
tbd67 is offline  
post #11 of 13 (permalink) Old Oct 29th, 11, 08:43 PM
Moderator
Guess
 
HwyStarJoe's Avatar
 
Join Date: Jan 2001
Location: New Taxes York
Posts: 15,366
Re: Engine Harness Help-Ground Wire

Keep the tube for the new wiring.

*---------------------------------*


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

HwyStarJoe is offline  
post #12 of 13 (permalink) Old Oct 30th, 11, 01:25 PM
Senior Tech
 
Join Date: Mar 2002
Location: Austin, TX, USA
Posts: 5,277
Re: Engine Harness Help-Ground Wire

Grounds are almost always black on a vehicle. I've seen some battery cables with a red ground before. Not a good idea IMHO. Sounds like the folks talking ignition might have something, but purple and yellow sound like starter terminal connections to me. Purple for crank and yellow for breaker ignition startup voltage. (Not needed for MOST Electronic ignition systems). I'd terminate any unneeded wires near the load point. Nip off the terminal (or not) and put a piece of heat-shrink tubing on it with some dielectric grease packed around the terminal. Shrink it up and tuck it back in the harness.

Dave
========================
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
dnult is offline  
post #13 of 13 (permalink) Old Oct 31st, 11, 08:28 PM Thread Starter
Senior Tech
Brent
 
Join Date: Jun 2010
Location: Tulsa
Posts: 321
Re: Engine Harness Help-Ground Wire

Thanks for the info guys. Got it put on Sunday and went on with no problems. The old wiring was pretty rough. Starting on the rear tail lamp harness next weekend......
tbd67 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome