Switchback LED side markers - direct splice or use adapters?

Turtlezorg

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Hello everyone, I'm a new member here with a 2020 Civic Sedan Si, with factory LED headlights. Been reading a few threads here and there to get to know the car better.

I recently bought these cool looking switchback LED side markers (daylight running light + turn signal) from AliExpress (https://www.aliexpress.com/item/32817317032.html) and want to connect them in a way where the original car parts stay intact (specifically no wire splicing) and I could easily disconnect them and revert back to original state if they decide to die.

Looking for opinions on pros and cons of going this route versus the typical wire splicing method that I keep seeing using the T Tap wire connectors (https://www.amazon.com/dp/B07114RK67) or similar.

So far I came up with this plan:

- Create a harness that will sit in between the car's LED headlight harness and the LED headlight. The harness can be made using the female Sumitomo 6189-7423 (https://www.aliexpress.com/item/32922755665.html) and the male Sumitomo 6181-6850 (https://www.aliexpress.com/item/32968740442.html) and 8 wire pieces. These appear to be the same type of connectors as the factory ones. The side marker's turn signal wire will be spliced into the corresponding turn signal wire in the harness and sealed using heat shrink connectors (https://www.amazon.com/gp/product/B07C3NBTJ9).

- Connect the side marker's daylight running light positive and negative wires to the T10 male socket adapter (https://www.amazon.com/dp/B0837SZ1NJ) using heat shrink connectors. Insert the T10 socket adapter into the factory T10 194 bulb socket, which inserts into the factory plug, which is wired to the car.

To me this looks good in theory, but I'm afraid of these possible issues:

- Will there be any unwanted voltage/amperage/resistance fluctuation because each connection has 3-4 adapters? Can the side markers burn out because of so many connections? I'm not an electrical expert and heard that there may be unwanted resistance / heat introduced because of extra connections.

- it looks like the T10 male adapter <-> T10 socket connection is not going to be waterproof and will be exposed to moisture. Should I use some kind of sealant here? I'm pretty sure all other connections should be waterproof.

Here's a diagram I put together, and also including some side marker photos for reference. I only installed one temporarily to take photos, they're currently sitting at home.

Appreciate any input!

Honda Civic 10th gen Switchback LED side markers - direct splice or use adapters? switchback-side-marker-diagram


Honda Civic 10th gen Switchback LED side markers - direct splice or use adapters? IMG_20200527_221340


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jayy_swish

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Should be fine making a harness. The one I purchased came with one already, but the turn signal wire will need to be spliced.. really no way of avoiding that one. For sealing just slab on some dielectric grease, that will help some
 
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Turtlezorg

Turtlezorg

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Should be fine making a harness. The one I purchased came with one already, but the turn signal wire will need to be spliced.. really no way of avoiding that one. For sealing just slab on some dielectric grease, that will help some
Cool thanks for the feedback. I'll give this a shot.
 

Hydrolic11

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How did it go? I was thinking/wanting to try the same thing, for the same reasons
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