THUNDERMAX - 309-324 - Pigtail ECM Harness

Q: Where can I find installation instructions for this product?

General installation notes are provided on the product page where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat for questions about difficulty, required tools, or whether professional installation is recommended.

The THUNDERMAX 309-324 is a pigtail ECM harness made in the USA that adds a second communication port for tight-clearance motorcycle installations, allowing easy ThunderMax integration without relocating the ECM.

Features

Handy for motorcycle models with tight clearances around the ECM such as Dyna, Softail Rocker and '02-'05 V-Rod models
Allows a second port for the communication cable connection to the ThunderMax
Made in the USA

ⓘ NOTE: Requires ThunderMax ECM with serial number 114000 or higher (produced beginning August 2008). Will not work on previous model ThunderMax part # 232661 TBW unit.

ⓘ NOTE: Installed into the bike's wiring harness at the 36-pin ECM connector (connection requires harness plug disassembly; two terminated wires are inserted into two unused ports in the 36-pin connector, and a ground wire added).

Specs

Base Color: White
Color/Finish: Black
Color/Finish: Silver
Riding Style: Street
Base Color: Black
Product Name: Pigtail Harness
Units: Each
Color/Finish: White
Type: ECM

Frequently Asked Questions - THUNDERMAX - 309-324 - Pigtail ECM Harness

General info

How do I know if this part fits my vehicle?

Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.

What does it mean if a product is listed as universal fit?

Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.

Where can I find installation instructions for this product?

General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.

What if I have more questions about this product?

Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.