Trailer light wiring and trailer light rewiring. Installing boat trailer lights or lights for small trailers with 4 flat or 4 pin connectors. If you need to repair or replace the lights on a small utility trailer, flatbed trailer or boat trailer without trailer brakes, this video covers some of the things that will help you install new trailer lights or replace your old and broken 4 pin trailer wiring.

The 4 flat trailer wiring harness or 4 pin trailer wiring is commonly used on small trailers, jet ski trailers, jon boat trailers, utility trailers, flatbed trailers, and single axle boat trailers. Often because the trailer light kits are very inexpensive, it is cheaper to buy a whole new trailer light kit rather than individual components unless you can determine that only one trailer wiring component needs to be replaced.

Here are links to buy the items mentioned in this video through Amazon.
1. Basic Trailer Light Kit - https://amzn.to/3FkXvlO
2. Submersible LED Trailer Light Kit - https://amzn.to/3RVvkBC
3. 4 flat trailer wiring harness - https://amzn.to/3QcXruK
4. Basic left side trailer light - https://amzn.to/3Fg4aOl
5. Basic right side trailer light (for licence plate) - https://amzn.to/3S1P5rd
6. Waterproof Butt Connectors - https://amzn.to/3PEYSkd
7. Wire cutter, stripper, crimping tool - https://amzn.to/3PUTFWN
8. Heat gun - https://amzn.to/3PCifdJ
As an Amazon Associate I earn a small commission from qualifying purchases.

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00:00 Introduction
00:25 4 pin trailer wiring
00:45 Basic trailer light kits and trailer wiring components
01:45 Running the wires to rewire or connect lights to your boat trailer
04:30 Basic 4 pin trailer wiring diagram
04:46 Mistakes made when I decided to rewire my small boat trailer
06:22 Inspect and test your existing trailer wiring to determine what needs to be replaced
06:42 The weak link with most 4 pin trailer light kits
08:17 Conclusion

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