Jeep CJ Wiring Harness - Centech Wire he complete Jeep harness comes in three sections. The engine harness is pre-wired for all your lamps, Delco alternator, horn, and fan motor, etc. There's no problem if you don't have the original engine in your jeep. Labeled wires make connecting your instruments to the engine easy. Extra ground wires are included in this harness for fiberglass bodies. Amazon: jeep cj wiring harness Amazon's Choice for jeep cj wiring harness. Dual High Low Beam Headlight Relay Wiring Harness H4/9003 With High Heat Ceramic Plugs. 4.2 out of 5 stars 128. $29 $ 29. 99. Get it as soon as Tomorrow, Aug 27. FREE Shipping by Amazon. Only 19 left in stock - order soon.