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Old 02-25-2023, 09:33 AM   #1
BanjoDude
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Proper Under-hood Wiring

Hi guys!

I'm working to clean up the under-hood situation on my new-to-me '69C-20. Someone mentioned that I should reroute the cruise control wiring as with stock, and I'm sure there are other things (there's a splice using Wago connectors and lamp wire...), so I plan to clean things up properly there as well.

Could anyone show me a pic of how the cruise wires should be routed?

Also, the cigarette lighter does not work. I'd like to have it for phone chargine.
Is there a typical fail point on those that I should look into first?

Thanks!

Wes
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Old 02-25-2023, 10:13 AM   #2
mm1077
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Quote:
Originally Posted by BanjoDude View Post
Hi guys!

I'm working to clean up the under-hood situation on my new-to-me '69C-20. Someone mentioned that I should reroute the cruise control wiring as with stock, and I'm sure there are other things (there's a splice using Wago connectors and lamp wire...), so I plan to clean things up properly there as well.

Could anyone show me a pic of how the cruise wires should be routed?

Also, the cigarette lighter does not work. I'd like to have it for phone chargine.
Is there a typical fail point on those that I should look into first?

Thanks!

Wes
Not familiar w the cruise but my cig lighter wire runs straight from the fuse panel spot labeled cig to the back of the lighter in my 67. I added an inline fuse to the wire for a little piece of mind. I believe it’s a 12ga wire with a special end on it that attaches to the lighter. If you needed to start from scratch the whole new repro lighter kit is about 30 bucks I think
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Old 02-25-2023, 03:10 PM   #3
jabborabbo
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Re: Proper Under-hood Wiring

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Originally Posted by mm1077 View Post
Not familiar w the cruise but my cig lighter wire runs straight from the fuse panel spot labeled cig to the back of the lighter in my 67. I added an inline fuse to the wire for a little piece of mind. I believe it’s a 12ga wire with a special end on it that attaches to the lighter. If you needed to start from scratch the whole new repro lighter kit is about 30 bucks I think
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I also ran a fused 12 gauge wire to my lighter in my 67…but I fused it for a LOT of piece of mind!
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Old 02-25-2023, 11:58 AM   #4
Beach-Burban
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Re: Proper Under-hood Wiring

Quote:
Originally Posted by BanjoDude View Post
Hi guys!

I'm working to clean up the under-hood situation on my new-to-me '69C-20. Someone mentioned that I should reroute the cruise control wiring as with stock, and I'm sure there are other things (there's a splice using Wago connectors and lamp wire...), so I plan to clean things up properly there as well.

Could anyone show me a pic of how the cruise wires should be routed?

Thanks!

Wes
Hey Wes...and welcome to the board! I too have some engine bay rewiring (and assorted other ideas) intended to clean up the look...but here are pictures of my cruise control setup. The original owner had it installed as a "dealer installed" option (so not on the SPID) however he was the Service Manager for that dealership (for 45 years!), so I'm assuming they did it correctly for him. It appears that the "CC box" is not as far forward as yours...but the wiring and "tubes?" pass behind the inner fender. I kind of like the further forward position of yours so I might see if I have enough "slack" to move mine! I hope the pictures help!

Woody

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Old 02-25-2023, 03:51 PM   #5
Accelo
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Re: Proper Under-hood Wiring

GM didn't fuse any of the lighters in the 60-early 70's. And I am unsure what year they decided this wasn't a good practice. My Auto-wire did fuse the power to the lighter. Other than the air-conditioning fan one has very few issues with stock wiring. I contribute it to the system being so simple, especially compared to modern stuff. Most, if not all, of the electrical issues I have had to deal with over the years had to do with owner modified stuff. Like tail lights and radios. One can't add a radio to an airplane without it being inspected or completed by a A&P mechanic. After inspecting so many hacked radio installs it's painfully obvious why. One looked like a rat's nest behind the radio. They had tied the dash light feed to the ground on the radio. Brown and black are the same are they not?
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Old 02-25-2023, 04:45 PM   #6
GMCPaul
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Re: Proper Under-hood Wiring

This is everything we have for Cruise Control from the dealer installation instructions with diagrams to assembly service manual diagrams. Hopefully it helps.



























Paul Jr @ GMCPauls
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Old 02-25-2023, 08:58 PM   #7
Beach-Burban
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Re: Proper Under-hood Wiring

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This is everything we have for Cruise Control from the dealer installation instructions with diagrams to assembly service manual diagrams. Hopefully it helps.

Paul Jr @ GMCPauls
Wow...according to the diagram showing the location of holes for mounting the cruise control regulator (now I know the proper name for the CC box), mine are nowhere close to the specifications (even my extra sets of holes weren't right!). Oh well, but very cool that you supplied the information Paul Jr...hopfully it will help the OP if he's trying to get his original.

Woody
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Old 02-25-2023, 10:40 PM   #8
BanjoDude
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Re: Proper Under-hood Wiring

Wow! Thanks, guys. This is way more than I expected and will help me to make it right. Sure appreciate all the effort!

Wes
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