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  View original topic: installing new wiring harness in T5
William Crowell Thu Mar 06, 2025 12:27 pm

I've read all the online posts and watched all the videos I can find, but I'm still pretty unclear on how to pull my new YNZ wiring harness through the transmission tunnel. Any advice would be appreciated.

wagen19 Thu Mar 06, 2025 2:13 pm

William Crowell wrote: I've read all the online posts and watched all the videos I can find, but I'm still pretty unclear on how to pull my new YNZ wiring harness through the transmission tunnel. Any advice would be appreciated.

I did it with a Roadster. Cause of the bigger ring-connectors for starter and generator, I started in the rear and pulled, pushed the smaller conecters forward. Using a bit silicone-rubber-plastic spray. It was easier, than I thought. A long steel wire can help (a old choke wire from beetle for ex.) (new german wiring harness came with good plan)

William Crowell Sat Mar 08, 2025 11:18 am

I wasn't even sure if I should pull the wiring harness from the front toward the rear of the car, or vice versa, so I emailed Scott at YNZ, and here's the brief summary he sent. I found it quite helpful. (I added some comments.)

"Silicone spray is your best friend..... Spray the tunnel and the harness liberally .... Tie a small-thin but strong rope/twine to the taillight/engine section (the rear end of the harness).... start from the dash side and put the rope through the tunnel...(rear end of the harness first); then while someone is pulling on the rope from the rear of the car the other person is helping feed it through the tunnel on the dash side..... Lots of silicone spray will make it much easier."

wagen19 Sat Mar 08, 2025 11:28 am

William Crowell wrote: I wasn't even sure if I should pull the wiring harness from the front toward the rear of the car, or vice versa, so I emailed Scott at YNZ, and here's the brief summary he sent. I found it quite helpful. (I added some comments.)

"Silicone spray is your best friend..... Spray the tunnel and the harness liberally .... Tie a small-thin but strong rope/twine to the taillight/engine section (the rear end of the harness).... start from the dash side and put the rope through the tunnel...(rear end of the harness first); then while someone is pulling on the rope from the rear of the car the other person is helping feed it through the tunnel on the dash side..... Lots of silicone spray will make it much easier."

Of course, there are many ways to Rome. Main thing is, you can meet the target.



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