Home » Public Forums » GMCnet » Wiring harnesses - kinda Non-GMC
| Wiring harnesses - kinda Non-GMC [message #120601] |
Sat, 02 April 2011 17:05  |
Luvn737s
Messages: 1106
Registered: June 2007
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For those with OEM experience, do manufacturers usually build one standard electrical harness for a given model with all the plugs and wiring there for optional equipment, even if those options are not installed?
I am restoring a car which had AC as an option, but didn't have AC and I'm trying to find out how thoroughly I need to scour the electrical harnesses.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] Wiring harnesses - kinda Non-GMC [message #120610 is a reply to message #120606] |
Sat, 02 April 2011 17:46  |
James Hupy
Messages: 6806
Registered: May 2010
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Kinda does vary quite a lot. If we are talking about GMCs, Most came with in
dash AC. GM was pretty much using shared harnesses on the Coaches. Higher
priced makes like Cadillac more frequently came with AC and as a result
their main harness had provisions for sub harnesses for accessories. Chev,
not so much. Other divisions within GM before shared chassis became the rule
rather than the exception produced their own harnesses, but I am not as
familiar with brands other than Cad and Olds. There might be some real GM
experts lurking about whose recall hasn't gone the way of the DoDo bird.
Chrysler was the master of mid year modifications and early harnesses varied
from late ones. Since the advent of automation and bar code readers and very
high tech engine controls and OBD 1 and 2 it is impossible to track parts
without a vin code. Ain't progress neat? The truth of the matter is that
today's automotive products are quieter, more durable, go much longer
between tune ups, and one heck of a lot more expensive. Better? That is
another subject.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Sat, Apr 2, 2011 at 3:24 PM, John R. Lebetski <gransport@aol.com> wrote:
>
>
> I think it varies. In the old days the non AC cars did not usually have
> the AC wiring. This is what I have noted on GMs.
> --
> John Lebetski
> Chicago, IL
> 77 Eleganza II
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| Re: [GMCnet] Wiring harnesses - kinda Non-GMC [message #120612 is a reply to message #120611] |
Sat, 02 April 2011 18:06 |
emerystora
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Registered: January 2004
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On Apr 2, 2011, at 5:00 PM, Gord Hubbell <g.r.hubbell@gmail.com> wrote:
>
>
> James Hupy wrote on Sat, 02 April 2011 18:46
>> ...Ain't progress neat? The truth of the matter is that today's
>> automotive products are quieter, more durable, go much longer
>> between tune ups, and one heck of a lot more expensive. Better?
>> That is another subject.
>
>
> Jim, I always feel it's like Zippo versus 'Bic'. Today's offerings
> are certainly built with brains, but generally (sadly), seemingly
> intended to be disposable. Providing you don't loose it, you can add
> fluid and flints and even a wick to a good old Zippo indefinitely. ;)
>
> Gord :)
> _
At least until you die of lung
cancer! :)
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| Re: [GMCnet] Wiring harnesses - kinda Non-GMC [message #120614 is a reply to message #120612] |
Sat, 02 April 2011 18:19 |
James Hupy
Messages: 6806
Registered: May 2010
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Emery, I was going to say that I still have a couple of the old zippo
lighters from when I quit smoking about 48 years ago. I haven't put any
Ronsonall in them but the flints still spark OK. Todays gasoline smells a
little like lighter fluid did then, particularly in winter blended gasoline.
I think that naptha was the principal ingredient & as I remember it there
used to be a Gasoline brand on the west coast called Napthaline. It went the
way of Chevron white pump 105 Octane, I guess. I wonder if we could run our
GMCs on lighter fluid? Might be cheaper.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Sat, Apr 2, 2011 at 4:06 PM, Emery Stora <emerystora@mac.com> wrote:
>
>
> On Apr 2, 2011, at 5:00 PM, Gord Hubbell <g.r.hubbell@gmail.com> wrote:
>
> >
> >
> > James Hupy wrote on Sat, 02 April 2011 18:46
> >> ...Ain't progress neat? The truth of the matter is that today's
> >> automotive products are quieter, more durable, go much longer
> >> between tune ups, and one heck of a lot more expensive. Better?
> >> That is another subject.
> >
> >
> > Jim, I always feel it's like Zippo versus 'Bic'. Today's offerings
> > are certainly built with brains, but generally (sadly), seemingly
> > intended to be disposable. Providing you don't loose it, you can add
> > fluid and flints and even a wick to a good old Zippo indefinitely. ;)
> >
> > Gord :)
> > _
>
> At least until you die of lung
> cancer! :)
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: Wiring harnesses - kinda Non-GMC [message #120636 is a reply to message #120601] |
Sat, 02 April 2011 21:58 |
Craig Lechowicz
Messages: 541
Registered: October 2006
Location: Waterford, MI
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Wiring harnesses get very specific to years, models, trim levels and options within trim levels. Depending on how old of car you have there weren't nearly as many options available as nowadays, so there would be fewer variations. But, shortly before I was broomed from GM, I was pretty heavily involved in a program to re-assess how wiring harness trade-offs were made. For instance on a modern Chevy Malibu, there could be as many as 200 different harnesses depending on options. Even within that number, in some cases, there would be "giveaway" leads and connectors that weren't used and were taped off. There is a trade-off in logistics and assembly costs from carrying many variations at a plant, vs. "giving" away leads and connectors.
Since your car is old enough to have a/c as an option, a simple way to look at it might be if more than about 70% of that model were sold with a/c there's a good chance all the harnesses had at least the leads for it, even if your car didn't include a/c. But that is just a guess, and depends on a lot of specifics, like how good of option forecasters they had, what the price of copper was, and how friendly the assembly plant was to deal with.
Craig Lechowicz
'77 Kingsley, Waterford, MI
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| Re: Wiring harnesses - kinda Non-GMC [message #120872 is a reply to message #120601] |
Mon, 04 April 2011 20:28 |
Craig Lechowicz
Messages: 541
Registered: October 2006
Location: Waterford, MI
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I'm not sure how far along with it they were in 1977, but Toyota is the evangelist (but probably not the inventor) of the "lean" production system that virtually all large scale manufacturers use some form of today and are probably still ahead of anyone else on that path. The ultimate goal of the system is to be extremely efficient at a lot size of 1, rather than 1,000's. With things like; just in time inventory, the concepts of "flow" and consistent "tacht" times or cycle times to drive out "muhda" or waste, my guess is that even back in '77, Toyota wasn't giving away any wires they absolutely didn't have to. Plus in those days, a lot of imports did a/c at the port of entry. So, you are probably going to be disappointed in looking for a/c wires if it wasn't already optioned or port installed. On the other hand, I'll bet they made it pretty easy to do after the fact.
Craig Lechowicz
'77 Kingsley, Waterford, MI
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