Ignition wiring question on a 66 - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

LinkBack Thread Tools Search this Thread Display Modes
post #1 of 4 (permalink) Old Feb 18th, 16, 9:00 PM Thread Starter
Tech Team
Join Date: Jan 2015
Location: Milwaukee
Posts: 106
Ignition wiring question on a 66

I am reassembling my 66 with a 327 auto part of the harness that runs along the firewall just behind the distributor has three wires that stick out a blue one goes to the oil sensor and a reddish pink goes to the positive of the coil the last one is a black wire with a white fabric coating it appears to have been connected to the spade that connects to the positive coil terminal along with the reddish pink one It was cut and not connected prior to restoration I can start the car now without it connected Do I need it?
Organics08 is offline  
Sponsored Links
post #2 of 4 (permalink) Old Feb 18th, 16, 9:12 PM
Join Date: Jul 1999
Location: Priddis, Ab. Canada
Posts: 9,342
Re: Ignition wiring question on a 66

The pink and black/fabric goes to the + side of the coil. The pink is fed from the starter at the S terminal and the black is from the ballast resistor.

Starts on pink and runs on the black. Sound like your pink is also wired somewhere else though.
Here's a wiring diagram:


Levon Hovagimian
Team Chevelle #279
2015 Camaro ZL1 Summit White (Bone Stock)
70 Chevelle SS 454 LS5 4 speed. SOLD
Current Engine VortecPro 460 (513 HP) Original is resting
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1966 427 Corvette SOLD
1973 Camaro IHRA Hot Rod (LS-6 Auto)11.00 @121 (Chased a 10.99 or better) SOLD

Priddis Greens, Ab. Canada

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
LevonH is offline  
post #3 of 4 (permalink) Old Feb 19th, 16, 9:29 AM
Lifetime Premium Member
Join Date: Mar 2011
Location: Wimberley, TX (SW of Austin)
Posts: 4,749
Re: Ignition wiring question on a 66

In an attempt to clarify-try and disregard the prvious post when reading the following:

The fabric coated wire is a resistor wire which reduces voltage to the coil from 12v to 9v and is the primary positive feed to the coil when the engine is running (key switch in the "ON" position).

The purple wire is routed to the starter solenoid which activates the starter when the key switch is in the "START" position. During this event, the solenoid acts as a relay to route 12v to the coil via the brown wire for starting events only.

YES, you need it connected if the remainder of the coil/solenoid connections are installed correctly. I suspect that they are not since your engine continues to run with key switch in the "ON" position...Meaning you are sending 12v to the coil at all times.

Corey banned permanently on 3-6-20 for continued abuse and generally being a time-wasting PITA. This guy doesn't seem to be able to get the idea that nobody has been hired to follow him around cleaning his messes.This action taken by Tom Mobley

If anybody wants to re-instate him please contact me or post in the mods section first. I can be reached at
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
dream66 is offline  
post #4 of 4 (permalink) Old Feb 19th, 16, 11:23 AM
Senior Tech Team
Join Date: Aug 2011
Location: Poteau, Ok
Posts: 4,697
Re: Ignition wiring question on a 66

Are you still running a points type distributor? The Black wire may have been removed because the car is using an electronic points replacement or an HEI and needed full batt+ to operate the ignition.

You're just jealous because you can't hear the voices!

1967 Olds Cutlass 468 BBC/T400
1963 Plymouth Fury 440/Torqueflite
2007 Ford Mustang GT (momma's car)
oldcutlass is online now  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevelle 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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:


Old Thread Warning
This Thread is more than 1506 days old. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
If you still feel it is necessary to make a new reply, you can still do so though.

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
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