If you have a Jeep and haven’t done this upgrade, keep reading. This wiring harness enables your truck to send power directly from the battery to the headlights via a couple of relays instead of routing the electricity into the dash and through the light switch. In Jeeps I’ve been told routing the electricity through the switch robs a lot of power and causes dim headlights.

In this excellent video from YouTube user BleepinJeep, he finds that this $25 upgrade more than doubled the light output from his stock headlights. That was even better performance than he got from his upgraded LED lights on the new harness (and the LEDs didn’t put out enough heat to keep themselves free of snow). He takes you through the whole install.

You can get this harness from a place called K Suspension Fab but they were backordered at the time of this post. Here’s a link where you can find it on Amazon. That link is for H4 headlights. Check first to see what kind of headlights you have.

Thanks to my good friend Nathan for the tip!