1972 240z wiring harness replacement - Nissan : Datsun Oct 08, 20141972 240z wiring harness replacement. What is the best and cheapest way to fully replace complete wiring harness. vallejoZowner is offline color coded wires, all MILSPEC save for the datsun connectors and my hand written wiring diagram with new reference colors and 'wiring numbers' per Milspec designation.. Ahh what having time, and aAuthor: Acemon Datsun Wiring Harnesses | Wiring Specialties LSx / Gen IV DBC Wiring Harness for Datsun (All) - PRO SERIES. $870 $829 USD. Choose Options. RB20DET Wiring Harness for Datsun - PRO SERIES. $660 $629 USD. Choose Options. RB25DET NEO Wiring Harness for Datsuns - PRO SERIES. $712 $679 USD. Choose Options.