Videos of xj headlight wiring harness upgrade 4:32Watch the videoHeadlight Harness Upgrade29K views · 2 years ago9:55Watch the video89 Cherokee Headlight Wire Harness Upgrade37K views · 5 years ago3:21Watch the video90 Xj Headlight Wiring upgrade877 views · 2 years ago7:22Watch the videoHeadlight Harness Install127K views · 3 years ago2:49Watch the video01 Jeep Cherokee XJ H4 Headlight Conversion16K views · 5 years ago14:39Watch the videoThe Best $25 Jeep Upgrade - Make Your Stock Headlights AWESOME!23K views · 4 months agoSee more videos of xj headlight wiring harness upgrade H4 Upgraded Headlight Harness - K Suspension 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 doTake the load off the system and wire your lights directly to the battery!Plug 'n Play designNo wiring needed Watch our video below for some guidance on how the install will go! Jeep Headlight upgrade for the YJ Wrangler and XJ Cherokee. After the harness upgrade, upgrade the lamps. There are H4 conversion kits or even HID if you really want to light up the night. Jeep Headlight upgrade - Install relay kit. Installing a relay kit is super easy. I tossed around building one from some wire terminals, relay sockets and such.