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#1 |
Registered User
Join Date: Jul 2018
Location: California
Posts: 18
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72 C10 OEM, Classic Update Harness Questions
Hey all,
So, when I purchased my 72, the owner had a new in the box Classic update kit from American Autowire. I know the truck runs, it just has the dash harness taken out. My question is this, if I were to purchase the original factory harness from AAW instead of of messing with the Update install, can the other harnesses from the Classic Update harness be "mixed and matched" to go with the factory dash harness? Such as the Dome light harness, Front and rear light harness, etc. Seems a waste to not use the classic update stuff, I just have no "need" for it. No power windows, a/c etc. I don't have the time right now to crimp up the update harness. What would you all do? Also, it seems like the classic update turn signal/column connector looks very different than the factory, as there is no half-moon style connector in the kit. Thought that was odd. Thank you. This site has helped so much with my build. I m grateful. |
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#2 |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,487
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Re: 72 C10 OEM, Classic Update Harness Questions
I installed a Classic Update harness in a 66 Chevy C10. I could have used it on a totally stock basic truck or one with A/C, HEI, power windows, later model steering column, etc. Don't know what to say about the missing turn signal/column connector. It is even included in the universal kits!
Since then I have installed one of their universal harnesses on an 82 pickup, which wasn't trivial, but I saved $400 over their Classic Update kit for 73-87 trucks. Have to tell you their tech support guys are awesome! I'd suggest you get your ducks in a row, write down your questions, and call them.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#3 |
Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,662
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Re: 72 C10 OEM, Classic Update Harness Questions
I don't believe you can mix and match everything with an AAW harness. Can't remember for sure. The way you're describing wanting to do things, it sounds like you will be better off buying stock style harness sections from M&H because they're plug n play like you want. The half moon connector isn't used by AAW, they include a later model year connector. On mine, I de-pinned it, and reused it.
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72 C10 lwb fleetside -stock 350/350 combo |
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#4 |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,487
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Re: 72 C10 OEM, Classic Update Harness Questions
Here's what AAW says about about GM turn signal switch connectors:
69-74 -- 3-7/8" straight connector 75-up -- 4-1/4" straight connector I don't understand why your 72 truck would have the half-moon connector used on 68 and earlier trucks. ![]()
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#5 |
Mr. Cheyenne
![]() Join Date: Jun 2020
Location: Kyle, Texas
Posts: 1,688
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Re: 72 C10 OEM, Classic Update Harness Questions
my 72 has the half-moon connector in it. While I can't be sure, I don't think the wiring has been replaced, though maybe it was (it is not in bad shape).
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Richard '72 Chevy C10 Cheyenne *Super WHT/MED BRONZE/WHT SBC 350 | TH350 | LWB | AC | Buddy Seats Upgrades: Tilt | Front Sway Bar | Radio | Sliding Window | Bed Spare w/Lock Bed Rails | Full LEDs | Courtesy Lights | Tachometer | Glovebox Lock & Light | Head Light Relays | *Upgraded Fully Super Trim |
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#6 |
Registered User
Join Date: Nov 2018
Location: South San Francisco CA,
Posts: 436
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Re: 72 C10 OEM, Classic Update Harness Questions
From what I remember everything for AAW is prewired into the fuse block and the other bags just plug into the wires already in the block. My son and I rewired his whole truck in a few weekends, and I am slow and very overly careful when doing something for the first time. I would use the AAW kit and scrap the other stuff. The AAW kit has a separate harness that will allow you to add stuff like power windows, stereo, separate radiator fans and other accessories. And yes, to whoever said their customer service is good, I second that. I called them a bunch of time and they never were at a loss for assistance. AAW to me, is a solid product with great customer service.
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#7 |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,487
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Re: 72 C10 OEM, Classic Update Harness Questions
All I can determine is cars switched to the 3-7/8" flat connector in 69, but apparently trucks didn't. So I stand corrected.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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#8 |
Senior Member
![]() Join Date: Nov 2013
Location: East Tennessee
Posts: 2,141
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Re: 72 C10 OEM, Classic Update Harness Questions
I think there is an adapter available for the column connector
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1967 C10 Step side 1968 C10 Step side 1970 Chevrolet K/5 Blazer 1972 Chevrolet K/5 Blazer ............. ![]() |
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#9 | |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,487
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Re: 72 C10 OEM, Classic Update Harness Questions
Quote:
I'd rate both AAW and Ron Francis very high, however the RF kits don't use a bulkhead connector, but instead run wires through the firewall. On the other hand, AAW uses GM replica bulkhead connectors in their Classic Update kits. Some people like the RF kit because there are fewer connections to fail, but it would be a pain if you ever needed to remove the front clip. Both have very good instructions and tech support, but I think AAW is a little better in both categories. And both are light years better than EZ Wire's poor instructions and arrogant tech support. The only nice thing I can say about them is they used good quality GXL wires with thicker high temp "cross-linked" insulation, as do AAW and RF. I haven't use Painless, but I have used their 132 page(!) manual for their 73-87 pickup kit to get information I couldn't find anywhere else. I suspect their products are also first rate.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! Last edited by MikeB; 02-06-2021 at 03:28 PM. |
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#10 |
Registered User
Join Date: Jul 2018
Location: California
Posts: 18
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Re: 72 C10 OEM, Classic Update Harness Questions
Thanks everyone for the input! As to the half moon connector, I’m not entirely sure why my 72 has one. I’m pretty sure it can be discarded though. I’m gonna tackle the Update kit. But no way I’m buying the crimpers from them. The guy at Brothers posted on YouTube that a good ratcheting set would suffice. Gonna take the advice here and use only what I need, scrap the rest. Seems like too much harness for what I need ha. Now I need to look into this deal about going from an external alternator to an internal, per what AAW says. I have HEI distributor already. Any threads on that? You guys are the best.
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#11 |
Registered User
Join Date: May 2018
Location: Grand Haven, mi
Posts: 269
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Re: 72 C10 OEM, Classic Update Harness Questions
I just installed a classic update and it took me about 40 hours it seems like and I have a box full of extra wires that was not needed from being cut for length and items I did not need
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#12 |
Senior Member
![]() Join Date: Jul 2000
Location: North Texas
Posts: 3,487
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Re: 72 C10 OEM, Classic Update Harness Questions
I used these for several jobs. The kit has several different dies that work with many types of terminals, including the Packard Delphi type.
https://toolaid.com/product/18920
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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1972 c/10, harness, wiring |
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