Complete Wiring Harness Source? - BMW 2002 FAQ Mar 23, 2016Re-digging up an old thread. Did you learn anything in your research? We're about ready to undertake a "restoration" of a 2002 and I know the wiring has some glitches (like windshield wipers don't always turn off, for example). Trying to figure out whether to start fresh or try to clean up the wiring harness. wiring harness question - BMW 2002 and other '02 - BMW I have a wiring harness for the engine from a 72Tii but I am not sure it will be compatible with the 74 harness. I did a search and it appears that I can use a 7 non Tii harness so long as I have the engine harness. Will a 73 harness work as I have a lead on one from a non Tii 73.