✓ VERIFIED
Oct 30, 2020
Very good buy , great replacement on my 99 FXD that had no Brake light or blinkers this purchase fixed all five lighting problems
NAMZ CUSTOM CYCLE
SKU: 850-09077
NAMZ Custom Cycle Trailer Isolator 4-Wire 8-Pin Molex - Harley & Indian V-Twin
$125.95
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About NAMZ Custom Cycle
NAMZ Custom Cycle builds plug-and-play wiring harnesses, extension kits and electrical components for Harley-Davidson. Its handlebar extension and connector kits are what make an ape hanger or bagger bar swap a bolt-in job instead of a splicing project.
When towing a trailer with a 4-wire output, the NAMZ Custom Cycle Trailer Isolator is your solution for protecting your V-twin's electrical system. This isolator prevents the factory turn signal module from being overloaded by drawing power directly from the battery. It ensures reliable trailer light operation while safeguarding your motorcycle's sensitive electronics.
Why riders pick this
- Protects OEM turn signal module from trailer load
- Features 4-wire trailer output with flat 4-pin connector
- Utilizes an 8-pin Molex input
- Four internal relays powered directly from battery
- Manages combined brake/turn, run, and ground circuits
This NAMZ Custom Cycle Trailer Isolator is specifically designed for 4-wire trailer outputs, featuring a molded flat 4-pin connector. It utilizes an 8-pin Molex input and a robust system of four internal relays to manage trailer lighting. By drawing power directly from your battery, this isolator completely bypasses the OEM turn signal module, preventing it from experiencing the extra current draw of a trailer. This crucial isolation extends the life of your bike's factory electrical components and ensures trouble-free towing.
Dedicated 4-Wire Trailer Output
- Provides a molded flat 4-pin connector for 4-wire trailers
- Manages left/brake, right/brake, running, and ground circuits
- Four internal relays draw power directly from the battery
- Protects the OEM turn signal module from trailer load
Smart Electrical Protection for Your Towing Setup
Towing with a 4-wire trailer setup requires careful electrical management to avoid damaging your motorcycle's original equipment. This NAMZ trailer isolator is an essential upgrade, offering a dedicated and protected power source for your trailer lights. It integrates seamlessly into your V-twin's electrical system, providing peace of mind that your factory modules are safe from overload. Ride confidently, knowing your bike is protected while you're on the road with your trailer.
Specifications
- Brand: NAMZ Custom Cycle
- Manufacturer Part #: NTI-08-FW
- UPC: 810088716478
- Connector Type: 8-pin Molex
- Trailer Output: 4-wire
- Length: 12 in
- Width: 6 in
- Height: 2 in
- Weight: 0.75 lbs
Common questions
Why is a trailer isolator important for 4-wire trailer setups?
A trailer isolator protects your OEM turn signal module by drawing trailer power directly from the battery through relays, preventing the factory module from being overloaded by the combined brake/turn signals of a 4-wire trailer.
What is the trailer output type of this isolator?
This NAMZ isolator provides a 4-wire trailer output with a molded flat 4-pin connector, handling left/brake, right/brake, running, and ground signals.
Does this isolator work with all V-twin motorcycles?
This isolator is designed for V-twin applications with an 8-pin Molex input. While suitable for many Harley-Davidson and Indian Motorcycle models, always confirm compatibility with your specific bike using our Shop by Bike tool.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | NAMZ Custom Cycle |
| TYPE | Electrical |
| SKU | 850-09077 |
| WEIGHT | 0.75 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
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