94 jeep wrangler wiring harness in eBay Motors | eBay Find 94 jeep wrangler wiring harness from a vast selection of eBay Motors. Get great deals on eBay! 94 Jeep Wrangler ECU ENGINE WIRING HARNESS LOOM 2.5 5 SPEED Manual 56028289 289. Pre-Owned. 12" inch 416W Led Light Bar Spot Flood Combo Beam Slim +Free Wiring Harness kit (Fits: 1994 Jeep Wrangler) Brand New. Jeep Chassis Wire Harness - Engine & Transmission Wiring The purpose of a Jeep YJ wiring harness is to deliver electrical and other information to places your rig needs it. Many of the Jeep's systems have their own wiring harnesses. For example, your rig has a Jeep transmission wiring harness and an engine wire harness assembly. Unfortunately, over time, wiring harnesses can wear out.