Pins 1, 48, 60, & 65 are 15v+ (need at least 15v to flash, some need 18v, makes SURE it's DC and NOT AC coming from PSU) I recommend using shielded female spade terminals from Radio Shack in lieu of an actual ECM harness as alligator clips are a tight fit with the shielding on them. Try not to bump it during reading/flashing. Make sure it's on something that doesn't produce static, or conduct electricity (no metal work stations) and don't let the wires dangle- don't want a loose connection barely there.
Neg (-) ground pins are ONLY 24 and 25. (25 isn't numbered; these are what I used to read and flash mine)
I am quite new to this subject and I am simply trying to ascertain the correct facts and not provoke or antagonize anyone.
From the above then you are saying that only the 6 pins you have identified/listed above need to be connected for a standard ECU bench flash? They are used only for the power supply to the ECU and to ground the unit, surely other pins must be connected to receive/transmit data, and I understood those to be pins 62 (CAN_H) & 63 (CAN_L) and this brings the total number of pins connected to 8 (eight). This procedure obviously uses the CANBUS method utilising either the Lawicel CANUSB converter/adaptor or johnc's combiadaptor.