RB20DET Wiring Guide For Dummies - NICOclub Dec 31, 2009Find related tutorials and information on your vehicle in NICOclub’s RB20DET / RB25DET / RB26DETT Forum. During my swap i decided to make a wiring guide that even the biggest noobs shouldnt have a hard time following. I looked at all the various guides out there and added what they were missing and clarified the bits that may confuse others.[PDF] Nissan Airflow Meter Diagrams Rb25 AFM RB25 AFM Series 1 Nissan Skyline R33 Series 1 Wire A - Not Connected Wire B - Signal Wire C - 12v Ground Wire D - Signal Ground Wire E - 12v Power 80mm Can be used on RB26 in twin form as an upgrade from the standard AFM's (ECU Change required) RB25 AFM Series 2 Nissan Skyline R33 Series 2 White with Blue Trace - Ground Orange with