Complete wiring replace
2026 Loser of the Year
Joined: Sep 2013
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From: New Or-leens Loo-z-anna
YouTube may have some videos. Start with a section of wiring that is easy to replace. Before you remove a section of wiring take lots of pictures of the section to show how it is routed over/under/around/and through the car ......it will help you put the new sections of wiring in place.
Burning Brakes
Joined: May 2017
Posts: 774
Likes: 375
From: Seattle WA
YouTube may have some videos. Start with a section of wiring that is easy to replace. Before you remove a section of wiring take lots of pictures of the section to show how it is routed over/under/around/and through the car ......it will help you put the new sections of wiring in place.
I got my harnesses from Zip. They are AWESOME!
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Just a helpful hint as I replaced all the wiring on my 69 last fall. Hang the harnesses up by one end and straighten them out, working from the fuse block/bulkhead connectors. Separate the wires where the break out of the main body of the harness and take all the twists and turns out without kinking them. After that, when you start to lay them in they will be more relaxed and easier to bend or feed thru any places they might need to go.
Burning Brakes
Joined: May 2017
Posts: 774
Likes: 375
From: Seattle WA
Just a helpful hint as I replaced all the wiring on my 69 last fall. Hang the harnesses up by one end and straighten them out, working from the fuse block/bulkhead connectors. Separate the wires where the break out of the main body of the harness and take all the twists and turns out without kinking them. After that, when you start to lay them in they will be more relaxed and easier to bend or feed thru any places they might need to go.
Oh and those connections to the back of the tail light housings matter! Mine sheered off so I had to buy new housings.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
I lay the new harness in on top of the old one- at least the engine and forward light harnesses, then removed one at section at a time and put the new harness right back in. You do need to watch that you keep the break out wires in close to the same spot.
Thread Starter
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Joined: Feb 2007
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Thanks gentlemen for all your help, but you forget about us guys that just jump in and tear things apart with out thinking.we need more basic directions.like starting out empty and place each piece as it comes.
Melting Slicks
Joined: Nov 2005
Posts: 2,296
Likes: 156
From: Clayton New Jersey
I did it a couple years ago on my 71. I just gutted the interior, pulled out the old harness and installed the new one. I did the engine harness too. It was pretty easy. Just take some pictures for routing purposes and you shouldn't have an issue. Good luck!
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I just did a complete rewire a couple months ago with lecture limited harnesses. All the factory wiring had been removed by the PO, so I basically started from scratch. It really wasn't that bad. The aim for your year will have routing instructions. I think it was in UPC 5. Forum members helped too with any questions I had.
The rear harness was the most difficult to me, there is just not much space to work with. Front and engine were the easiest. My dash was completely out so the main harness was pretty easy as well. The hardest part there was routing harness by tach and speedo.
I would suggest hanging the harnesses up so bends fall out. I didn't, but it would have made it easier. I also zip tied my main harness to the interior dash support and labeled each connection before dash reinstall.
The rear harness was the most difficult to me, there is just not much space to work with. Front and engine were the easiest. My dash was completely out so the main harness was pretty easy as well. The hardest part there was routing harness by tach and speedo.
I would suggest hanging the harnesses up so bends fall out. I didn't, but it would have made it easier. I also zip tied my main harness to the interior dash support and labeled each connection before dash reinstall.