air flow sensor wiring
 

can anyone help me out with the wiwirng of the 4.6 air flow sensor? it is marked A B C D on the top. one is +12volts, one is ground, one is signal, and one is signal ground. can anyone let me know which is which? if by color that is fine also. thanks in advance!!

If you look at the harness head on with the clip on the top, it goes (from left to right) REF(A), SIG(B), GND(C), B+V(D).

thanks for your reply, but are you sure? according to chilton's it is A= power, B= ground, C= MAF rtn, D=MAF. not knowing what rtn means, nor is it referred to anywhere, nor does anyone else know what it means i am assuming that C= signal ground.where did your info come from? thank you.

Whoops! I listed them backwards:

(D)Ref, (C)MAF signal, (B)GND, (A)B+V

You should probe across MAF signal and GND to determine if your MAF is working. Should be around 1.5-2 volts at idle. B+V is the battery possative terminal and should be 12V (with respect to GND).

MAF rtn is what you are looking for.

so what does MAF rtn stand for? are you sure that you dont have C and D mixed up. I believe that C is the signal ground and D is the signal output but i may not be right, that is what i am trying to establish. I am using a 4.6 mass air sensor on another engine as a conversion and need to make sure that it is wired correctly. thank you for your replies.