World's Largest Aftermarket Motorcycle Parts and Accessories Superstore!


Thunder Heart Performance Complete Electronic Harness Controller

Product may vary from photo(s).

Everyday Low Price: $331.99

Gold Club Price: What's This? The Gold Club is our premier membership program. For most items members receive 10% off every day, plus exclusive sales and benefits just for members. More Info $298.79

J&P Part: 381-001

Rating: Read Reviews

This item qualifies for free ground shipping

– Order in the next to ship today.


Thunder Heart Performance Complete Electronic Harness Controller

• Performs all fuse, relay and flasher functions in one small module

• Electronic module utilizes all surface mount technology and microprocessor which eliminates cumbersome relays and flashers

• High-tech circuit interrupters replace circuit breakers for more compact and less complicated wiring harness

• Improved serviceability, using industry standard AMP and Molex connectors for reduced harness clutter

• Provides more sophisticated flasher performance (signal cancel on second command, hazards, etc)

• Water resistant package and connectors for trouble-free operation in all conditions

• Diagnostic LEDs indicate short/overloaded circuits for easy troubleshooting

Made In The USA This product was proudly made in the USA

Product Specs

Manufacturer Part Number: ASM4250D

Sold in Units: Kit

Switch: No


Customer Reviews

Overall Rating:
5/5 based on 20 ratings

5 by

Bought to replace the EHC on a 2003 Big Dog Bulldog. Got instructions from Thunderheart for moving 4 wires. EASY install. Used a ford tractor ignition switch to replace the BDM switch.

5 by

Bought to replace the EHC in a 2003 Big Dog Bulldog. Works perfect. I called Thunderheart to get the sheet to move a few pins around. Just followed the sheet and it works perfect. You need a new ignition switch. I bought a ford tractor ignition switch from tractor supply. Minor filing for fit.

1 by

bought 2 thunderheart ing. systems in the past and they worked for a while(mounths) and then had trouble with turn signals. right now allworks except the left turn signal. no signal coming from main componant

5 by

Again I havn't installed as yet and again the on line service for my questions about this item were great!...mates who know about these types of items tell me I did well buying this from you guys! stuff

5 by

Excellent product.

5 by

Super easy to work with. Made my job so much easier. I recommend it

5 by

Excellent product, made wiring my custom very easy and quick. If you're building a bike from the ground up, this is the way to go. Thanks J&P.

5 by

Great product

5 by

Great product made the wiring of my bike very easy. They took the guess work out and help me make quick work out of wiring the bike.

5 by

Didn't use the harness but the controler worked well. Great help on the phone.

5 by

Makes wiring the bike so much easier....comes in a nice case.

4 by

Works great! Easy to understand instructions, even for an electrical idiot (like myself).

5 by

Quite possibly one of the single best products one can get from J&P. This has everything you need for wiring a bike whether you're building one, customizing, or replacing a poorly designed OEM wire set.

5 by

it made wiring the bike very simple. all the wires are labeled so you know where they go. it is a great part to use if your building a bike.

5 by

Used this to wire my first custom built bike. Made wiring simple. Don't know how it could be made any easier. Well worth the money spent.

Load More Reviews

Important Product Notes

Once opened, electrical items cannot be returned, except in the case of a manufacturing defect.

Live Help

Get Help From Our Industry Experts

Call Us 24/7 1-800-318-4823

Help / FAQs