About | Hardcore Harness Co.

1995 Ford F-350 7.3 Powerstroke — the truck that started Hardcore Harness Co.

Started in the Driveway

Hardcore Harness Co. started the way most good ideas do — out of frustration. My 1995 F-350 7.3 Powerstroke needed an E4OD transmission harness. The original was 30 years old, brittle, and falling apart.

The options weren't great. Buy another 30-year-old harness from a junkyard with the same problems? Pay a shop $800+ in labor to chase wires? Splice a $50 pigtail kit into oxidized copper and crumbling insulation?

So I built my own. Then I built another one for a buddy. Then people started asking where to buy them.

HHC IndestructaWires — color options with branded boots

Not a Parts Reseller

I don't dropship harnesses from overseas. I don't rebrand someone else's product. Every harness is built by hand on a nail board jig, using materials I'd put in my own truck.

TXL automotive wire. Heavy-duty nylon corrugated conduit with serious crush strength, water resistance, UV protection, and strain relief at every transition. Dual-wall adhesive shrink at every connection. It's not the cheapest way to build a harness, but it's the right way.

Ford discontinued most of these connectors years ago. I've spent countless hours tracking down the exact OEM housings you need — so you don't have to.

HHC custom alternator harness — replaceable fuse holder detail

How We Build

Every HHC harness is manufactured in-house in Canton, Georgia. We trace each harness system from factory originals, source OEM-spec connectors, and assemble on dedicated nail board jigs for repeatable, consistent builds.

Our modular architecture means every harness section connects via Deutsch DT industrial connectors — field-serviceable, weather-sealed, and individually replaceable without cutting a single wire. That's not something you get from a junkyard pull or a pigtail splice kit.

Materials spec: TXL automotive-grade wire, heavy-duty nylon corrugated conduit (unsplit, high-temp rated, crush-resistant, water-resistant, UV-resistant) on all trunk and engine runs, dual-wall adhesive heat shrink at every termination. Shift solenoid sections use Tefzel wire in thick industrial fiberglass insulation sleeving.

HHC custom 7.3L Powerstroke alternator harness — full assembly

What We Cover

HHC specializes in wiring harnesses for 1980s through early-2000s Ford trucks — the generation Ford stopped supporting but owners refuse to stop driving. Our current production line covers E4OD transmission harnesses and Alt/AC harnesses for the 1994.5–1997 OBS platform, with shielded ignition wire sets for OBS gas engines.

We also build custom harnesses to spec. We've done sealed alternator harnesses for 7.3 Powerstroke sled pullers — fully encapsulated with a replaceable fuse instead of the OEM fusible link, built to survive mud, water, and heat that would destroy a stock harness.

The roadmap includes coverage for F-150, Bronco, and manual transmission variants (ZF5, M5OD), plus expansion into earlier and later Ford platforms as our connector sourcing grows.

HHC branded spark plug wire boots — close-up of build quality

The Mission

These trucks are worth keeping on the road. The Powerstroke platform built Ford's reputation in diesel — and the trucks around those engines are aging. But the motors will run forever if you take care of them.

Ford forgot about these trucks. The aftermarket sells band-aids. We're building the harnesses these trucks deserve.

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BUSINESS

Hardcore Harness Co. LLC

Contract manufacturer of automotive wiring harnesses for Ford trucks. Currently covering the 1992–1997 OBS platform.

Canton, Georgia 30114

alan@hardcoreharnessco.com

For wholesale, OEM, or parts sourcing inquiries, please use our contact form and select "Wholesale / B2B Inquiry."