I will test to be sure but logic tells me that my reasoning is what should work. Reverse light is the wild card, as it has been a recent addition to most setups. A mechanic friend of mine was saying that 7 pins usually run just 6, leaving the reverse light dummied off if it's not readily available. I figure that since I most likely have it, I will wire it in. The beauty of the 4wires in the OEM harness is that they are meant to be T-ed into, since they run the the vehicle's turn, brake, reverse & running lights.