Thunder Heart Performance Complete Electronic Harness Controller

Very easy to use, and if you do run into an issue the customer service is outstanding

Updated my girl for desert heat should work great

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.

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.

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

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!...top stuff

Excellent product.

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

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.

Great product

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.

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

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

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

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.

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.

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.