Better Relay Headlight Harness For Sale

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Better Relay Headlight Harness For Sale

Postby Mass » Thu Jan 03, 2019 3:50 pm

Finally for sale!

In case you haven't seen the build thread on these...
My upgraded "serehill" harness includes:

- 12 gauge GXL load wire
- 14 gauge GXL "trigger" wire
- Separate fused supply circuits for high and low beam
- Waterproof Hella 40 amp relays
- Delphi (Aptiv) terminals in relay socket and fuse holder
- Perma Seal Molex marine grade ring terminals
- Waterproof fuse holder with a spare fuse
- High temp "gray stripe" nylon wire loom
- Ceramic headlight connectors for superior heat resistance - good for stock or high wattage bulbs
- Plug and play - no cutting into stock wiring - can be reverted back to stock at any time
- I refer to it as a "terminal to terminal" build because I build each one from the ground up without splices on everything. I don't build with "pigtail" components

Here's the "just"

A headlight relay harness is perfect for the weak headlight electrical system in our jeeps.

It takes the load away from the switch and feeds the headlights the best possible voltage directly from the battery or alternator. This gives the brightest and most reliable output from the headlights possible.

It can be used for stock sealed beams or higher performing sealed beam conversions that utilize H4 bulbs. I'm running two 90w/130w H4 bulbs without an issue. The stock wiring would have melted at that wattage.



A little over a year ago when I realized I needed my high beams on to see at night. I knew something was wrong. I also knew from a previous experience exactly what I needed. So I bought a harness on ebay. Complete JUNK! I ended up patching it together with wire and parts I had to make it work right. Shortly after that I joined IFSJA and very quickly discovered a thread started by "Serehill". Everyone has seen it. Its the one about a harness that promised to fix the very issues I and many others are/were having.
I was a little late to the game with his unfortunate passing but something he said stuck with me. His signature says "If you can't make it better why waste your time."
The light bulb went off. Why not MAKE a BETTER harness?
So here I am. A little while later and making what I feel is a superior harness at a very reasonable price.



Due to the high parts costs and time associated with making a quality harness my final price will be $100.
This includes domestic shipping including Alaska, Hawaii, Puerto Rico, Guam, and U.S. Virgin Islands



- If you'd rather hard wire the relay signal wires I will delete the male plug that goes into the OEM female plug and include 3 butt connectors and heat shrink. $5 less making it $95 total.

This is more of a preference you decide when installing.

- Kit is made so you can conceal the "fuse holder" behind the passenger headlight for a stock look or have it in the engine bay for easy accessibility

- Also I left the power wires long enough to go to the battery or alternator. Whichever one you choose will work.



Please ask them!
Feel free to PM if you'd like to buy one










* Cross-posted from IFSJA *
89' GW 6BT Cummins

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Re: Better Relay Headlight Harness For Sale

Postby pecanme » Sat Jan 19, 2019 10:41 am

I just wanted to drop a comment for anyone thinking about buying Matt's(Mass) harness. DO IT! I purchased one weeks ago and it's been great. The quality is freaking good you guys. The dudes at IFSJA also think so looking at the feedback from other buyers. Good job and keep up the good work!

P.s. if you decide to make a tailgate harness I'll buy one for sure.

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Re: Better Relay Headlight Harness For Sale

Postby rlrhodes711 » Sat Mar 16, 2019 8:08 pm

Can you make it without the fuse block and enough slack to mount the relays under the hood? I currently have one of Serehills harnesses and I power the relays off of an under hood fuse block. You can see them in this pic. I have a separate fuse for the low/high beams. I’d like to get your harness as well.


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Re: Better Relay Headlight Harness For Sale

Postby MikeH » Sat Mar 23, 2019 12:57 pm

I am interested in a couple harnesses, one for a 79 J10 and the other is a 71 J4800. Email is the best way to reach me or PM and will try to check back.

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