Wiring Harness - 1994 Jeep Wrangler - RepairPal Jan 06, 20091994 Jeep Wrangler / Wiring harness; Wiring Harness (1994 Jeep Wrangler) You can try to call the dealer (or a Jeep dismantler) and ask the parts guy to check the part numbers for the engine harness. Another way is to compare the wiring diagrams between the 94 and 95. It might be safe to assume if all the connectors plugged in, the harnesses3.9/5(1) 1994 Jeep Wrangler OE Wiring Harnesses & Stereo Adapters Jeep Wrangler 1994, Factory Replacement Wiring Harness by Metra®, with OEM Radio Plug. For factory stereo. This high-quality Metra wiring harness is just what you need to replace your defective or aged factory wiring harness.