Need help putting a location to this wire.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

88Ironduke · 09-19-2013, 10:40 AM

Subject truck is 72' C-10 with the 250/3OTT. I have a new engine harness that I bought from one of the vendors here on the forum. Its nicely built and looks really good. I have identified everything on the harness except for one wire. Its a large pink, looks like a 12G lead with a connector that is similar to an HEI but is not. I have been digging thru the schematics and the location or use has eluded me. My assessment is electric choke? The wire is wrapped into the section of the harness leading across the engine over to the points distributor. It makes sense but I expect to be wrong.

http://i1291.photobucket.com/albums/...psdcc1f609.jpg

Here is a picture where the connector goes in to the fire wall. Its the double pink set, 2nd from the right on the top row.

http://i1291.photobucket.com/albums/...ps27a470d6.jpg

What is it and can it be repurposed to supply power for an HEI distributor? This harness is so simple yet this one lead has been bugging me.

Thanks in advance.
88Ironduke

*Fitz* · 09-19-2013, 02:08 PM

Quote:

Originally Posted by 88Ironduke

Subject truck is 72' C-10 with the 250/3OTT. I have a new engine harness that I bought from one of the vendors here on the forum. Its nicely built and looks really good. I have identified everything on the harness except for one wire. Its a large pink, looks like a 12G lead with a connector that is similar to an HEI but is not. I have been digging thru the schematics and the location or use has eluded me. My assessment is electric choke? The wire is wrapped into the section of the harness leading across the engine over to the points distributor. It makes sense but I expect to be wrong.

http://i1291.photobucket.com/albums/...psdcc1f609.jpg

Here is a picture where the connector goes in to the fire wall. Its the double pink set, 2nd from the right on the top row.

http://i1291.photobucket.com/albums/...ps27a470d6.jpg

What is it and can it be repurposed to supply power for an HEI distributor? This harness is so simple yet this one lead has been bugging me.

Thanks in advance.
88Ironduke

Yellow and purple go to starter. See Diagram.

88Ironduke · 09-19-2013, 04:37 PM

Thanks but those are the easy ones to pick out. I'm looking for the purpose of the large pink wire. It is tied to the same location on the firewall plug as the distributor ballast circuit. I can't find the pink wire on any schematics.

Any one else?
88

marvgarr68 · 09-19-2013, 05:50 PM

looks like its for hei. Is there a cloth white wire in the harness? If not its for hei if you do have the ignition wire and the heavy pink one is tied into it at the plug then its for hei. Pink is for hei in later model trucks with factory hei

**jaros44sr** · 09-19-2013, 06:14 PM

In GM language, pink is always 12volt switched, so you could use it to power HEI or choke

**bigmac73** · 09-19-2013, 07:15 PM

Quote:

Originally Posted by Fitz

Yellow and purple go to starter. See Diagram.

if you have upgraded to a HEI ignition then you should get rid of the yellow wire to the starter, that was for extra power while starting with the old set up and you should not be hooked up to the resistor wire that went to the old coil, your HEI will not get the full voltage required.

88Ironduke · 09-19-2013, 07:49 PM

The truck has been upgraded to HEI and does not have electric choke. The cable end looks really close to an HEI connector but it is slightly different. I have the correct connector so worst case I'll solder it in place and call it good. I'm pretty sure it was intended for electric choke but I have a manual one. Life is good.

Thanks
88Ironduke

**hooverfish** · 09-19-2013, 07:53 PM

My pink wire goes to the elec. choke. Its a 72 350 with quadrajet, so I don't know if this is valid for your truck. But I suspect your initial guess was correct. I would post a picture but cannot get it to work, even after downsizing it.....

slow-1 · 09-19-2013, 09:00 PM

If you copy the "IMG" link from PB and paste it in your post, the picture shows up in the thread.

88Ironduke · 09-19-2013, 09:47 PM

Awesome. Just learned something new.

**hooverfish** · 09-20-2013, 09:44 AM

Quote:

Originally Posted by slow-1

If you copy the "IMG" link from PB and paste it in your post, the picture shows up in the thread.

what is PB ?

**FirstOwner69** · 09-20-2013, 09:59 AM

PB=photobucket. Had me thinking a while also.

09-19-2013, 10:40 AM	#1
88Ironduke Registered User Join Date: Jul 2010 Location: Willingboro, NJ Posts: 489	Need help putting a location to this wire.... Subject truck is 72' C-10 with the 250/3OTT. I have a new engine harness that I bought from one of the vendors here on the forum. Its nicely built and looks really good. I have identified everything on the harness except for one wire. Its a large pink, looks like a 12G lead with a connector that is similar to an HEI but is not. I have been digging thru the schematics and the location or use has eluded me. My assessment is electric choke? The wire is wrapped into the section of the harness leading across the engine over to the points distributor. It makes sense but I expect to be wrong. http://i1291.photobucket.com/albums/...psdcc1f609.jpg Here is a picture where the connector goes in to the fire wall. Its the double pink set, 2nd from the right on the top row. http://i1291.photobucket.com/albums/...ps27a470d6.jpg What is it and can it be repurposed to supply power for an HEI distributor? This harness is so simple yet this one lead has been bugging me. Thanks in advance. 88Ironduke __________________ Retired USAF - No rockets, no mortars, no bad guys shooting...No stress!!! My Build Thread: Project 72' Green http://67-72chevytrucks.com/vboard/s...d.php?t=587932

09-19-2013, 04:37 PM	#3
88Ironduke Registered User Join Date: Jul 2010 Location: Willingboro, NJ Posts: 489	Re: Need help putting a location to this wire.... Thanks but those are the easy ones to pick out. I'm looking for the purpose of the large pink wire. It is tied to the same location on the firewall plug as the distributor ballast circuit. I can't find the pink wire on any schematics. Any one else? 88 __________________ Retired USAF - No rockets, no mortars, no bad guys shooting...No stress!!! My Build Thread: Project 72' Green http://67-72chevytrucks.com/vboard/s...d.php?t=587932

09-19-2013, 05:50 PM	#4
marvgarr68 Registered User Join Date: Jun 2013 Location: kingman az Posts: 573	Re: Need help putting a location to this wire.... looks like its for hei. Is there a cloth white wire in the harness? If not its for hei if you do have the ignition wire and the heavy pink one is tied into it at the plug then its for hei. Pink is for hei in later model trucks with factory hei __________________ 1976 k20, 350 built, 44/14 axles 1968 c10 6.5 turbo diesel,t5 trans 1977 gmc c3500 dually, crew, 4-53t, 5&3 trans http://67-72chevytrucks.com/vboard/s...d.php?t=591188

09-19-2013, 06:14 PM	#5
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,766	Re: Need help putting a location to this wire.... In GM language, pink is always 12volt switched, so you could use it to power HEI or choke __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

09-19-2013, 07:49 PM	#7
88Ironduke Registered User Join Date: Jul 2010 Location: Willingboro, NJ Posts: 489	Re: Need help putting a location to this wire.... The truck has been upgraded to HEI and does not have electric choke. The cable end looks really close to an HEI connector but it is slightly different. I have the correct connector so worst case I'll solder it in place and call it good. I'm pretty sure it was intended for electric choke but I have a manual one. Life is good. Thanks 88Ironduke __________________ Retired USAF - No rockets, no mortars, no bad guys shooting...No stress!!! My Build Thread: Project 72' Green http://67-72chevytrucks.com/vboard/s...d.php?t=587932

09-19-2013, 07:53 PM	#8
hooverfish Senior Member Join Date: Oct 2012 Location: Lexington, Ky Posts: 2,147	Re: Need help putting a location to this wire.... My pink wire goes to the elec. choke. Its a 72 350 with quadrajet, so I don't know if this is valid for your truck. But I suspect your initial guess was correct. I would post a picture but cannot get it to work, even after downsizing it..... __________________ Larry 84 Chevy SWB, "Roy", dark blue OG paint, 5.7 LS1, 4L60, Vintage Air, 96k miles. "It's a sorry man who can't find his wife a good job"

09-19-2013, 09:00 PM	#9
slow-1 Registered User Join Date: May 2013 Location: Central NC Posts: 830	Re: Need help putting a location to this wire.... If you copy the "IMG" link from PB and paste it in your post, the picture shows up in the thread. __________________ 1972 Cheyene C-10 "Ole Green" My Grandfathers truck (early 70's to 1983) My first vehicle (1983) Original 350 (3 rebuilds) 700R4 from Bowtie Overdrives

09-19-2013, 09:47 PM	#10
88Ironduke Registered User Join Date: Jul 2010 Location: Willingboro, NJ Posts: 489	Re: Need help putting a location to this wire.... Awesome. Just learned something new. __________________ Retired USAF - No rockets, no mortars, no bad guys shooting...No stress!!! My Build Thread: Project 72' Green http://67-72chevytrucks.com/vboard/s...d.php?t=587932

09-20-2013, 09:59 AM	#12
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,852	Re: Need help putting a location to this wire.... PB=photobucket. Had me thinking a while also.



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