Hello! My car is '05 HONDA Civic LX. My mechanic is trying to figure out which relay is connected to the heater. I am referring to the four relays installed by the heater blower motor under the glove compartment: (Honda parts #) 39794-S04-014Relay Assy, Power (4p) (Micro Iso), 39794-S5A-003Relay Assy, Fuel Pump (5p) (Mitsuba), and 39794-S5A-901Relay, Pcm (4p). Two of them are black, one is orange, and the other one is blue. I would like to know which one is related to the heater. Thank you very much!