im heavy into my 07 flht to roadking conversion...ive got a problem!..the oil pressure sending switch on the flht is a two wire setup...the new roadking wiring harness is a one wire right angle plug setup..can i change the sending unit to a roadking sending unit?/ will this cause a ecm faultproblem?? help!!!

 

Not sure if it will cause a fault or not. BUT I don't think it will.
one wire is for the gauge the other wire is for the low oil warning light.
The switch provides the ground for both circuits.

You will have to refer to your 07 wiring diagram to see which is which.
My 01 might be different.

 

If it is a Green/Yellow wire, that goes to the idiot light on the RK. The second wire on the FLHT is Brown/Green and that is for the oil pressure gauge wiring. This, according to my '04 HD Service Manual.