H4 Upgraded Headlight Harness
H4 Wiring Harness Upgrade for any vehicle with the H4 light plug
Increase your OEM lighting output by a minimum of 50% (usually more)
Save your light switch from burning up like they always do
Take the load off the system and wire your lights directly to the battery!
Plug 'n Play design
No wiring needed
Watch our video below for some guidance on how the install will go! And a big THANK YOU to BleepinJeep for making an amazing video comparing oem lighting and even LED lighting, with full LUX numbers to show just how great this upgrade really is! We've added the video below as well!
If you have a 97+ Jeep Cherokee XJ with FACTORY FOG LIGHTS. You MAY or MAY NOT run into the issue of your headlights not switching back to low beam after clicking on the High Beams and having to turn your lights off/on again for it to correct itself.
If this is you, please do not worry, here is a simple fix for the situation:
Cut the 20g Red Fog Lamp Relay #1 ground/trigger wire at the back of the driver's side headlight plug (there's 2 red wires, the fog light one is usually the smaller one, confirm with test light). Extend this wire so that it is long enough to reach your new aftermarket harness high beam port. Splice it into the new harness Blue wire for high beams.
You are now fixed and ready to click between high and low whenever you would like!
*Vehicles outside of the Jeep XJ/MJ lineup may have to extend the positive cable to reach the battery location*