engine wire harness - Mazdaspeed Forums Dec 24, 2012Welcome to Mazdaspeed Forums. engine wire harness. I have been pulling tons of ridiculous codes and have decided that I have a bad connection somewhere within the harness. So I just received a used engine harness and am planning on replacing Wiring schedmatic for OEM BackupMay 13, 2016Wiring harness assistance please? Injector #1 P0201Jul 21, 2014AC Compressor Clutch Wiring BypassMay 23, 2014Under seat BOSE amp harness?Jul 08, 2013See more results Mazda Car Wiring & Wiring Harnesses for sale | eBay 10 11 12 mazdaspeed3 mazda speed wiring harness ms3 turbo 2010-2012. This was removed from a 2010 Mazdaspeed3 with 75,727. Up for sale is a used Mazdaspeed Wiring harness.